- Chimera-users - RBVI Mailing Lists

volume threshold
by Alex Perálvarez Marín 27 Apr '10

27 Apr '10

Hi, there is any command to change the threshold of a density map? I have 100 maps open at the same time, and I want to change the threshold of all of them at the same time. Thanks in advance, best Alex.

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something flakey with measure buriedArea?
by Scott Classen 27 Apr '10

27 Apr '10

I'm seeing some very odd results coming from the measure buriedArea command if I use different values for probeRaduis and then grep for WARNINGs I get the following results: probeRadius # of WARNINGs 1.50 = 12 1.40 = 4 1.39 = 14 1.35 = 59 1.30 = 3 1.20 = 0 Here are some examples of the types of warnings I'm seeing: WARNING: check_SES_edge: weird case, 1 probe full2 and not full1 WARNING: class_arete2: warning hole in a reentrant face 1735 WARNING: check_SES_edge: weird case, 1 probe full2 and not full1 WARNING: check_SES_edge: weird case, 1 probe full2 and not full1 WARNING: class_arete2: warning hole in a reentrant face 2557 WARNING: check_SES_edge: weird case, 1 probe full2 and not full1 WARNING: class_arete2: warning hole in a reentrant face 1836 WARNING: check_SES_edge: weird case, 1 probe full2 and not full1 WARNING: check_SES_edge: weird case, 1 probe full2 and not full1 WARNING: class_arete2: warning hole in a reentrant face 2090 WARNING: class_arete2: warning hole in a reentrant face 1925 WARNING: compute_SES_area: ERROR: Solide angle (-1.972093) for contact face 3142 too large or too small Should I be concerned? Another unusual thing is that for certain calculations I get some crazy answers. For example the following command measure buriedArea '#0:.A,.B & #0:10.Dz<8' #0:10.D probeRadius 1.4 vertexDensity 2 outputs: B1SES = -583.491, B2SES = 51.4762, BaveSES = -266.007 but the same command with the probeRadius changed to 1.37 measure buriedArea '#0:.A,.B & #0:10.Dz<8' #0:10.D probeRadius 1.37 vertexDensity 2 outputs: B1SES = 53.9334, B2SES = 51.7969, BaveSES = 52.8652 Why would B1SES be so radically different for these two measurements? Thanks, Scott ps When doing these calculations Chimera randomly crashes with the following mscalc crash report: Process: mscalc [25532] Path: /Applications/Chimera-1.5b.app/Contents/Resources/bin/mscalc Identifier: mscalc Version: ??? (???) Code Type: X86-64 (Native) Parent Process: python2.6 [25482] Date/Time: 2010-04-27 17:23:08.864 -0700 OS Version: Mac OS X 10.6.3 (10D573) Report Version: 6 Interval Since Last Report: 402 sec Crashes Since Last Report: 1 Per-App Crashes Since Last Report: 1 Anonymous UUID: D0B1026B-AD5E-454C-8E35-49CCF7598339 Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Crashed Thread: 0 Dispatch queue: com.apple.main-thread Application Specific Information: abort() called Thread 0 Crashed: Dispatch queue: com.apple.main-thread 0 libSystem.B.dylib 0x00007fff83cc7886 __kill + 10 1 libSystem.B.dylib 0x00007fff83d67eae abort + 83 2 libSystem.B.dylib 0x00007fff83c7fa75 free + 128 3 mscalc 0x00000001000218e5 MS_delete_SES_face + 920 4 mscalc 0x00000001000361f4 MS_update_ses + 919 5 mscalc 0x0000000100034f68 MS_restart_from_ses + 613 6 mscalc 0x0000000100036963 MS_update_ses + 2822 7 mscalc 0x0000000100037d94 MS_restart_from_triangulation + 591 8 mscalc 0x0000000100046c66 MS_triangulate_SES_component + 925 9 mscalc 0x00000001000066f6 MS_compute_surface + 443 10 mscalc 0x0000000100000ea2 main + 382 11 mscalc 0x0000000100000d1c start + 52 Thread 0 crashed with X86 Thread State (64-bit): rax: 0x0000000000000000 rbx: 0x0000000000000001 rcx: 0x00007fff5fbfd998 rdx: 0x0000000000000000 rdi: 0x00000000000063bc rsi: 0x0000000000000006 rbp: 0x00007fff5fbfd9b0 rsp: 0x00007fff5fbfd998 r8: 0x0000000000000e03 r9: 0x0000000000000000 r10: 0x00007fff83cc38ca r11: 0x0000000000000206 r12: 0x00000001001e4000 r13: 0x0000000100200000 r14: 0x0000000000000000 r15: 0x00000001004f7c70 rip: 0x00007fff83cc7886 rfl: 0x0000000000000206 cr2: 0x000000010022a000 Binary Images: 0x100000000 - 0x10004eff7 +mscalc ??? (???) <AF86E566-5546-A8C8-DE97-4A16408CB1BC> /Applications/Chimera-1.5b.app/Contents/Resources/bin/mscalc 0x7fff5fc00000 - 0x7fff5fc3bdef dyld 132.1 (???) <B633F790-4DDB-53CD-7ACF-2A3682BCEA9F> /usr/lib/dyld 0x7fff83c78000 - 0x7fff83e37ff7 libSystem.B.dylib 125.0.1 (compatibility 1.0.0) <CB9A4929-61AF-DE71-5635-133E9EC95783> /usr/lib/libSystem.B.dylib 0x7fff885a7000 - 0x7fff885abff7 libmathCommon.A.dylib 315.0.0 (compatibility 1.0.0) <95718673-FEEE-B6ED-B127-BCDBDB60D4E5> /usr/lib/system/libmathCommon.A.dylib 0x7fffffe00000 - 0x7fffffe01fff libSystem.B.dylib ??? (???) <CB9A4929-61AF-DE71-5635-133E9EC95783> /usr/lib/libSystem.B.dylib Model: MacPro1,1, BootROM MP11.005C.B08, 4 processors, Dual-Core Intel Xeon, 2.66 GHz, 14 GB, SMC 1.7f10 Graphics: ATI Radeon X1900 XT, ATY,RadeonX1900, PCIe, 512 MB Memory Module: global_name AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x87), Broadcom BCM43xx 1.0 (5.10.91.27) Bluetooth: Version 2.3.1f4, 2 service, 19 devices, 1 incoming serial ports Network Service: Built-in Ethernet 2, Ethernet, en1 PCI Card: ATY,RadeonX1900, Display, Slot-1 Serial ATA Device: ST3250824AS P, 232.89 GB Serial ATA Device: WDC WD2500JD-00HBC0, 232.89 GB Serial ATA Device: WDC WD1002FBYS-01A6B0, 931.51 GB Serial ATA Device: WDC WD1002FBYS-01A6B0, 931.51 GB Parallel ATA Device: SONY DVD RW DW-D150A USB Device: Hub, 0x05ac (Apple Inc.), 0x9131, 0xfd400000 USB Device: iPhone, 0x05ac (Apple Inc.), 0x1292, 0xfd430000 USB Device: Keyboard Hub, 0x05ac (Apple Inc.), 0x1005, 0xfd410000 USB Device: Apple Keyboard, 0x05ac (Apple Inc.), 0x021d, 0xfd412000 USB Device: Apple Cinema HD Display, 0x05ac (Apple Inc.), 0x9223, 0xfd420000 USB Device: Hub, 0x05ac (Apple Inc.), 0x9122, 0xfd300000 USB Device: Apple Cinema HD Display, 0x05ac (Apple Inc.), 0x921e, 0xfd320000 USB Device: USB Receiver, 0x046d (Logitech Inc.), 0xc525, 0x1d200000 USB Device: Bluetooth USB Host Controller, 0x05ac (Apple Inc.), 0x8206, 0x5d200000 USB Device: Back-UPS CS 500 FW:806.q5.D USB FW:q5, 0x051d (American Power Conversion), 0x0002, 0x5d100000 FireWire Device: built-in_hub, Up to 800 Mb/sec FireWire Device: unknown_device, Unknown

2 1

help with simple python script
by Scott Classen 27 Apr '10

27 Apr '10

Hi all, I have a number of PDB files that I would like to open, run a buriedArea calculation, save the results to a file, and exit I can put a bunch of commands in a file and launch it from a terminal shell chimera --nogui --nostatus --script calculate_buriedArea.com > results.txt the calculate_buriedArea.com file looks like this: open my.pdb measure buriedArea #0:.A #0:B This works, but is a bit cumbersome. I would like to make a python script so I can call my calculation with the name of the PDB file on the command line like this: chimera --nogui --nostatus --script calculate_buriedArea.py -- my.pdb .... so can someone please get me started here? import chimera myfile = chemera.somefunctiontoopenaPDBfile($1) Thanks, Scott

2 1

ChemGroups
by Mauro Truglio 27 Apr '10

27 Apr '10

Hi, I got to understand the syntax to edit and even create "new" chemical groups for chimera to select (I successfully edited the file __init__.py in ChemGroups). Now I'm facing this problem with aromatic amines: when selecting, for example, primary aromatic amine, *I'd like to include also che C atom in the selection* - not only N,H,H. With other chemical groups this was easy, thanks to the [1,1,1,0,1]-like notation. But these aromatic amines are described in a different way, through the function findAroAmines in miscFind.py, and I'm finding it difficult to edit it. Can you help me? Thanks Mauro Truglio

2 1

Daily Builds
by Jon N. Rumbley 27 Apr '10

27 Apr '10

Why is it that the Windows Daily Builds continue to say March 20, 2010 while the other operating system show the current date? Is the Windows version being built daily? Thank you, Jon Rumbley Dr. Jon N. Rumbley Assistant Professor Dept. of Pharmacy Practice and Pharmaceutical Sciences University of Minnesota-Duluth 127 Life Sciences 1110 Kirby Dr. Duluth, MN 55812 Phone: 218-726-6047 email: jrumbley(a)d.umn.edu

3 2

saving attribute to file
by Scott Classen 26 Apr '10

26 Apr '10

Hello, When I save attributes to a text file from the "Render/Select by Attribute" dialogue box the values are written to the file apparently in a random order. Is there a way to get the residues or atoms to be written in a sensible way? i.e. by residue/atom number. Thanks, Scott Classen

4 3

POV-Ray setting for movie making
by Paul Brandt 26 Apr '10

26 Apr '10

Hello, I am using chimera alpha version 1.3 (build 2577) running in linux (sled11) to make a movie using POV-Ray. The quality of the first few frames is stunning but thereafter becomes fuzzy around the edges of the molecule. Is there a way to fix this so that the entire movie is as clear and nice as the first few frames? Is there something wrong with my settings? Is what I'm seeing an artifact of mpeg compression? I am using the following POV-Ray settings to make an Mpeg1 movie Quality 11 Antialias: true Antialias method: recursive Antialias depth: 3 Antialias threshold: 0.3 Jitter: True Jitter amount: 1.0 Transparent background: false Wait for POV-Ray to finish false Keep input files: false Thanks for the help!! Paul

4 3

please stop these emails
by Dr. Ahmed Sofy 26 Apr '10

26 Apr '10

Dear chimera organizing Thanks alot for your efforts but i want stop these emails of users Thanks alot again for your efforts

2 1

HELP: I'm wondering about how to access the surface data
by "郑捷凯" 26 Apr '10

26 Apr '10

Hi chimera users, I'm wondering about several question: I installed chimera in my home dir, what's path to import in python? how can I access the data generated by mscalc in python?

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placeFragment
by Elisabeth Ortega 26 Apr '10

26 Apr '10

Dear all, I'm trying to place a fragment in certain position. I did this (on Python IDLE): from BuildStructure import placeFragment placeFragment( fragment, resName, model = 'scratch', position=None) Where fragment = benzene and resName = RING6 but I am not sure about that . Could you give me an example of placeFragment code? Thanks in advance. Elisabeth Ortega , Ph.D Student @ Universitat Autónoma de Barcelona

2 1

"cutoff" parameter in Find clashes/contacts option
by Anna Feldman-Salit 24 Apr '10

24 Apr '10

Dear All, I was unsuccessfully looking for the explanation to what exactly "cutoff" parameter means. I'm using the Find clashes/contacts option to identify the contacts and not clashes, by assigning the default values of -0.4A and 0.0 to "cutoff" and "allowance" parameters. However, I do not understand how it is used. I would very much grateful for the information, since I also want to include it in my dissertation. Best regards, Anna Feldman-Salit

3 2

transform coordinates
by Alex Perálvarez Marín 23 Apr '10

23 Apr '10

Dear all, I would like to change the coordinates (Euler angles) for an EM density map (Tools --> Movements --> Transform molecule coordinates). But in the molecule scroll menu, my map does not appear. Is possible to define the system coordiantes for a EM density map? Thanks in advance, Alex.

2 3

Displacement through vectors
by Elisabeth Ortega 23 Apr '10

23 Apr '10

Dear all, I'm trying to move an atom though a vector but I don't find the correct Python script to do that. The vector starts in the mass center of the molecule and finish in a nitrogen atom. I want to place Helium at 2 angstrom of the nitrogen atom following the mentioned vector. Could you help me with the script? Thanks in advance. Elisabeth Ortega, Ph.D Student @ Universitat Autónoma de Barcelona

2 1

level of detail (vrml)
by Damien Larivière 22 Apr '10

22 Apr '10

Dear all, Chimera is able to display VRML file. Is it able to display VRML file containing level of detail? (My first tentative was not a success but I do not think the file I used respected the format convention). My best reagrds Damien

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Small molecule dimensions
by le monk 21 Apr '10

21 Apr '10

Hello, I have a few pdb files of small molecules that I would like to know the dimensions of. Is it possible to use Chimera the measure the minimum x y z lengths - taking into account Van der Waals radii? Or perhaps you could suggest other software for this? Many thanks _________________________________________________________________ http://clk.atdmt.com/UKM/go/197222280/direct/01/ Do you have a story that started on Hotmail? Tell us now

3 4

hide dust
by weimin wu 20 Apr '10

20 Apr '10

Sometimes after we remove the dust using the tool of hiding dust, we want to save the map directly instead of using command "mask #0 #0" to generate a maskfile. The reason is that the masked map has minimized map size and different with original one. Even after we recover the map size and origin, it always has half pixel issue, and if we apply this mask to original map, the output will have some masking artifact. The iso-surface of the output will not be as smooth as original map or the map after hiding dust. weimin

3 2

Chimera on Acer Aspire 1410
by Mario J. Borgnia 20 Apr '10

20 Apr '10

Hi, I am running Chimera chimera-1.4.1-linux_x86_64 on my "netbook" style Acer Aspire 1410 with the following specifications: OS: Linux 2.6.31.12-0.2-desktop x86_64 Processor: Intel(R) Celeron(R) CPU 743 @ 1.30GHz Intel Mobile GM45 Express Chipset 1366x768 pixels The program runs well but surfaces disappear upon rotation. This is true for solid surfaces, as soon as I set the opacity to 0.99, the surfaces are no longer affected. Any hints? Thanks Mario Borgnia

2 1

Chimera and Nvidia 3D vision
by Joern Lenz 20 Apr '10

20 Apr '10

Hi there, I am wondering if anyone of you knows if I can use my Nvidia GTX295 together with the 3D vision glasses and a Samsung SyncMaster 120Hz screen to view 3D in Chimera using a Debian Lenny or a Windows 7 OS. About two years ago, Nvidia said they will support Unix systems with their glasses. However, up to now there is no news about that. Do you have any idea or even a way to get 3D on in Chimera using the hardware above ? Many thanks. Cheers, Joern

5 4

Save session for movie
by Francesco Pietra 18 Apr '10

18 Apr '10

Hello: I am carrying out the analysis of MD for a ligand wandering through a protein. Specifically following the pathway through the trace left by the centroid of the ligand. Apparently the "save session" doe not work for movie. I.e., I stopped the movie (with the centroids drawn at the various steps) at a certain step, then "save session" destroyed the graphics and only alpha-numeric appeared on the terminal. Is there a diffent procedure for such a case or only "save image"? This would greatly limit what could be done by reorienting the protein, coloring, labeling, etc. thanks francesco pietra

2 1

Is it possible to make ribbons transparent
by Ajith Harish 17 Apr '10

17 Apr '10

Hi, Please let me know if it is possible to make the ribbon representations transparent like the surfaces? Thanks, Ajith

2 1

Space Navigator on Linux
by Daniel Luque 15 Apr '10

15 Apr '10

Dear all, I am trying to use a 3DConexion SpaceNavigator with chimera in my linux machine. I have installed the SpaceNavigator drivers and they work properly with the manufacturer test tools (xcube and xvalue). Althought I am running the last chimera release, when I open chimera it does not "see" the device. Should I do something special when I start chimera or once it is open in order to use the device? Thanks in advance, Daniel

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why is Chimera so slow?
by Scott Classen 14 Apr '10

14 Apr '10

Hi All, First off, I'm fairly new to Chimera, and so far I'm very impressed with the functionality. Thanks for the great tool. I am embarking on a fairly intensive comparison of a dozen or so structures and I'm running into some serious performance issues. I have an older Mac Pro with dual 2.66GHz Intel Xeon processors, 14GB RAM, ATI RadeonX1900 w/512MB VRAM and Chimera (1.4.1 build 30365). I've got 3 PDBs loaded up and have calculated surfaces for all three with a vertex density of 20 (perhaps too high? but I need accurate values for the solvent-excluded surface for particular residues). With 2 models and 2 surfaces things start to slow down a bit, but are manageable. With 3 models and their associated surfaces I can't even rotate the view at all. Even if I only show one residue and residues with 5A. It's as if Chimera is doing all the behind the scenes calculations to rotate all the surface triangles and atomic coordinates that aren't even being displayed. Is there something I'm missing? Is it it unrealistic to set my surface density to 20? Any advice? Thanks, Scott

2 1

X-server segmentation fault on launching chimera
by Francesco Pietra 14 Apr '10

14 Apr '10

Hello: Having upgraded Debian Linux i386 squeeze release from kernel 2.6.30 to 2.6.32 everything works except X-server segmentation fault on launching CHIMERA, build 30282 of last March 29. I have successfully recompiled CHIMERA, last Apr 14 build, on the updated Linux release, to no avail. I need the experimental builds for features not included in the stable release (centroid trace in movie). To compare, another graphic program, GIMP, can be launched correctly. Below - between *** - the final part of "Xorg.0.log" reporting troubles. Before that, the log is identical to when X-server is working properly. Thanks for suggestions. francesco pietra ********* Backtrace: 0: /usr/bin/X (xorg_backtrace+0x3b) [0x80ada5b] 1: /usr/bin/X (0x8048000+0x5aa75) [0x80a2a75] 2: (vdso) (__kernel_rt_sigreturn+0x0) [0xb78b240c] Segmentation fault at address (nil) Fatal server error: Caught signal 11 (Segmentation fault). Server aborting Please consult the The X.Org Foundation support at http://wiki.x.org for help. Please also check the log file at "/var/log/Xorg.0.log" for additional information. (II) Power Button: Close (II) UnloadModule: "evdev" (II) Power Button: Close (II) UnloadModule: "evdev" (II) AT Translated Set 2 keyboard: Close (II) UnloadModule: "evdev" (II) ImPS/2 Logitech Wheel Mouse: Close (II) UnloadModule: "evdev" ********

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Fwd: Re: install
by Greg Couch 13 Apr '10

13 Apr '10

Forgot to cc the list. -------- Original Message -------- Subject: Re: [Chimera-users] install Date: Tue, 13 Apr 2010 11:25:43 -0700 From: Greg Couch <gregc(a)cgl.ucsf.edu> To: Jay Brown <jcb2g(a)virginia.edu> It may be that you downloaded the 32-bit version but only have the 64-bit runtime libraries installed or vice-versa. If you run "uname -m" in a terminal, it should print x86_64 if you have a 64-bit version of Linux. Please send me the full error message and I may be able to say more. - Greg On 04/12/2010 01:13 PM, Jay Brown wrote: > > Dear Chimera-Users: > > I am trying to install Chimera on a Linux Fedora 12 computer. Download > goes OK, but when I try to install the program I get an error message > saying: bad ELF interpreter: No such file or directory > > Do you know what this means? I can't find anything about ELF interpreter. > > -Jay Brown > > Jay C. Brown > > Department of Microbiology > > University of Virginia School of Medicine > > 1300 Jefferson Park Ave. > > Charlottesville, VA 22908 > > Email: Jcb2g(a)virginia.edu > > Phone: 434-924-1814 > > http://people.virginia.edu/~jcb2g/index.htm > > > _______________________________________________ > Chimera-users mailing list > Chimera-users(a)cgl.ucsf.edu > http://www.cgl.ucsf.edu/mailman/listinfo/chimera-users >

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xfowarding not working in new chimera
by Kenneth Frankel 13 Apr '10

13 Apr '10

My older version of chimera x forwards with no problem; from the about ucsf chimera window its beta version 1 build 2064 2004/12/15 for linux2 We have upgraded the 32 and 64 bit version which run fine locally. but when we run from another computer with ssh either with -X, -Y, -XY , -o ForwardX11=yes frankel@graphics1 we always get a crashe after trying to do something (e.g fetch a pdb) with the same genral error message frankel@graphics1:/home/frankel 102% /programs/chimera-1.4.1-x86_64/bin/chimera X Error of failed request: BadRequest (invalid request code or no such operation) Major opcode of failed request: 144 (GLX) Minor opcode of failed request: 181 () Serial number of failed request: 5374 Current serial number in output stream: 5379 (serial numbers may differ between runs) Can this be fixed? (We suspect it's a mesa library problem). Also when running nx client, even the old version of chimera from crashes. I'll have to get the error message later, but does anyone have experience running over nx client? we've gotten pymol, and vmd to work. thanks Ken Frankel

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Re: [Chimera-users] Chimera-users Digest, Vol 84, Issue 12
by Chinthaka Silva 13 Apr '10

13 Apr '10

Hi, Is there a way to quantify the electron densities in a unit cell with UCSF? Thanks, Chinthaka. On Tue, Apr 13, 2010 at 2:08 PM, <chimera-users-request(a)cgl.ucsf.edu> wrote: > Send Chimera-users mailing list submissions to > chimera-users(a)cgl.ucsf.edu > > To subscribe or unsubscribe via the World Wide Web, visit > http://www.cgl.ucsf.edu/mailman/listinfo/chimera-users > or, via email, send a message with subject or body 'help' to > chimera-users-request(a)cgl.ucsf.edu > > You can reach the person managing the list at > chimera-users-owner(a)cgl.ucsf.edu > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Chimera-users digest..." > > > Today's Topics: > > 1. install (Jay Brown) > 2. Re: Analysis of dihedral angles (Eric Pettersen) > 3. Re: Analysis of dihedral angles (sette(a)uniroma2.it) > 4. Re: Analysis of dihedral angles (Elaine Meng) > 5. Re: Analysis of dihedral angles (Eric Pettersen) > 6. Re: Display a spider volume data in a specific orientation > (Tom Goddard) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Mon, 12 Apr 2010 16:13:27 -0400 > From: "Jay Brown" <jcb2g(a)virginia.edu> > To: <chimera-users(a)cgl.ucsf.edu> > Subject: [Chimera-users] install > Message-ID: <009501cada7c$9ccfe2b0$d66fa810$@edu> > Content-Type: text/plain; charset="us-ascii" > > Dear Chimera-Users: > > I am trying to install Chimera on a Linux Fedora 12 computer. Download goes > OK, but when I try to install the program I get an error message saying: > bad > ELF interpreter: No such file or directory > > Do you know what this means? I can't find anything about ELF interpreter. > > -Jay Brown > > > > Jay C. Brown > > Department of Microbiology > > University of Virginia School of Medicine > > 1300 Jefferson Park Ave. > > Charlottesville, VA 22908 > > > > Email: Jcb2g(a)virginia.edu > > Phone: 434-924-1814 > > http://people.virginia.edu/~jcb2g/index.htm > > > >

2 1

Analysis of dihedral angles
by eduardo.troche＠uvigo.es 13 Apr '10

13 Apr '10

Hi all, I'm a new Chimera user. I'm performing some molecular dynamics with a more or less simple system with Amber,and now that I have them done, I would like to analyze some specific data,like changes in a dihedral angle during the dynamic process, or distances between pairs of atoms. If I select several dihedral angles in Chimera and I play the dynamic movie, I can see these changes, but is it possible to get a table of results that shows the value of this angle for each step of the dynamic process? Thank you every body! Eduardo

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surface holes
by Eric Pettersen 12 Apr '10

12 Apr '10

On Apr 12, 2010, at 5:05 AM, Guy Nimrod wrote: > Hello, > When I load complex structure (e.g., pdb 3mht) and show the surface > of one chain (e.g. selectchainA; action->surface->show), the > generated surface does not cover the interface between the query > protein and the other chains. Consequently, the interface appears as > a hole in the surface (see attached figure). > Is there an easy way to visualize the whole surface (i.e. the > generated surface on a selected chain will disregard chains which > are not selected)? Hi Guy, When you surface some subset of atoms in Chimera, Chimera still considers all atoms in the same "surface category" as the subset for purposes of computing the surface -- it just doesn't show the surface of the atoms not in the subset. So for example if you ask for a surface on a single residue Chimera doesn't make a surface that completely encloses the residue -- the surface is "open" where the residue connects to the rest of the molecule. Similarly, a single chain of a multi-chain molecule may not be completely enclosed if Chimera considers other chains of the molecule to be in the same surface category. That is what has happened here. Chain A (the protein) and the chains C and D (the nucleic acid) have been classified into the same surface category (main). To get the enclosed surface that you want you need to put chain A into a surface category of its own and surface that. These two commands will accomplish that: surfcat prot :.a surf prot The surface actually inter-penetrates the nucleic acid because of the flipped-out base, like this: --Eric Eric Pettersen UCSF Computer Graphics Lab http://www.cgl.ucsf.edu

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question about ViewDock
by Miriam Gochin 12 Apr '10

12 Apr '10

I have a question about ViewDock. It works fine for one receptor and several ligands, but if I open a second receptor model and rotate it, then ligands I open with ViewDock for the second receptor are in the original (unrotated) position. Is there a way to correct the ligand positions for the current rotation? Miriam Gochin Touro University - CA miriam.gochin(a)tu.edu 707-638-5463

2 2

install
by Jay Brown 12 Apr '10

12 Apr '10

Dear Chimera-Users: I am trying to install Chimera on a Linux Fedora 12 computer. Download goes OK, but when I try to install the program I get an error message saying: bad ELF interpreter: No such file or directory Do you know what this means? I can't find anything about ELF interpreter. -Jay Brown Jay C. Brown Department of Microbiology University of Virginia School of Medicine 1300 Jefferson Park Ave. Charlottesville, VA 22908 Email: Jcb2g(a)virginia.edu Phone: 434-924-1814 http://people.virginia.edu/~jcb2g/index.htm

1 0

problem with new Chimera 1.4 and 1.4.1 OSX Aqua
by Miriam Gochin 10 Apr '10

10 Apr '10

Dear Chimera team, I am not sure what I am doing wrong, but the new version does not open correctly on my Mac (OS-X-10.6.2). I get a small black square surrounded by white space that will not enlarge. Is there some setting I should adjust? Best wishes, Miriam Gochin Touro University - CA miriam.gochin(a)tu.edu 707-638-5463

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[Re: Residue exposition cutoff]
by Yasser Almeida Hernández 07 Apr '10

07 Apr '10

Thanks for your answer... About this i have an idea resumed in two question: In principle an solvent-exposed residue must have in average high value of b-factor, so will be very flexible. 1 - Can i say that those residues that have and average b-factor up to a cutoff value AND an areaSAS (or % of that area) superior than a other cutoff value, will be exposed to the solvent??? 2 - There is a cutoff value of b-factor for the residues flexibility? Best regards -------- Forwarded Message -------- From: Elaine Meng <meng(a)cgl.ucsf.edu> Reply-to: Chimera BB <chimera-users(a)cgl.ucsf.edu> To: Yasser Almeida Hernandez <almeida(a)cim.sld.cu> Cc: Chimera BB <chimera-users(a)cgl.ucsf.edu> Subject: Re: [Chimera-users] Residue exposition cutoff Date: Mon, 5 Apr 2010 11:22:37 -0500 Hi Yasser, Actually you don't have to use DMS ... if you show a surface in Chimera it also automatically computes the SES (solvent-excluded surface) and SAS area per atom and per residue, attributes named areaSES and areaSAS. For more details, see these previous posts: <http://www.cgl.ucsf.edu/pipermail/chimera-users/2008-November/003291.html > <http://www.cgl.ucsf.edu/pipermail/chimera-users/2009-February/003597.html > Some notes about areaSES and areaSAS: (1) if you don't want to include inside bubbles in the surface area calculations, after creating the surface(s) remove the inside bubbles with the command: setattr s allComponents false (2) the surface that Chimera displays is the SES (also known as Connolly surface or molecular surface), not the SAS, although both sets of areas are calculated Actually Tom Goddard mentioned the areaSAS attribute briefly in an earlier reply to you: <http://www.cgl.ucsf.edu/pipermail/chimera-users/2009-June/003995.html> As to what cutoff should be used for classifying atoms or residues as buried or exposed, I'm not aware of any commonly used value. It is a more philosophical issue that depends on your ultimate purpose. You might try coloring by different cutoffs to try to decide what is appropriate for your research (keeping in mind that the SES is what Chimera actually displays), or read publications of similar work to see what other researchers have used. In publications, I have seen residues classified by "fraction" or % of the surface area of a residue in the structure divided by the area of that same type of residue in a hypothetical fully exposed state, but I don't remember the exact cutoffs used, and Chimera does not provide the fully exposed values. An example of a program that does provide such values is GetArea: <http://curie.utmb.edu/getarea.html> I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab Department of Pharmaceutical Chemistry University of California, San Francisco On Apr 3, 2010, at 1:38 PM, Yasser Almeida Hernández wrote: > Hi all.... > I have 2 question, beyond Chimera's issues. > > 1 - There is some cutoff value to consider a residue or more > strictly, an atom exposed to the solvent?. > > 2 - Could i set a this cutoff using the area values and types (SR0, > SC0 and SS0) from the DMS program output? > > 3 - Wich program you recommend to compute SAS? > > Thanks, > best regards ----- Terminar mensaje reenviado ----- -- Yasser Almeida Hernández, BSc Center of Molecular Inmunology (CIM) Nanobiology Group P.O.Box 16040, Havana, Cuba Phone: (537) 214-3178 almeida(a)cim.sld.cu ---------------------------------------------------------------- Correo FENHI

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amino acid clashes
by Kirys, Tatsiana 06 Apr '10

06 Apr '10

Dear All, i'm trying to figure out scheme for calculating protein amino acid clashes. I've read in User's Guide that 1) The overlap between two atoms is defined as the sum of their VDW radii minus the distance between them and minus an allowance for potentially hydrogen-bonded pairs: overlapij = rVDWi + rVDWj dij allowanceij 2) It has an option: Ignore contacts of pairs [ N ] or fewer bonds apart (N=4 by default). i calculated rotamer clashes from "Penultimate rotamer library" according to 1) and there are clashes between N ans C N and CB N and CG CA and CG CA and OD1 etc. i'm sure i do something wrong because "Penultimate rotamer library" was checked for the clashes. I dont understand why 2) option exists, what is the physical meaning of it? and why N can be cosed arbitrary? many thanks Tania

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structural similarity measures in Chimera
by Elaine Meng 05 Apr '10

05 Apr '10

Dear Minming, Dr. Ferrin forwarded your question to me. We recently added calculation of structure similarity measures to Chimera. This capability is not in versions 1.4/1.4.1, but only in 1.5 (recent daily builds, which are also available from our download page). In such recent builds, the "Match -> Align" tool (under Tools... Structure Comparison in the menu) calculates two measures that have been described in previous publications, the SDM and the Q- score. The SDM has been used to construct phylogenetic trees before. I don't know if the Q-score has been used that way. Documentation for Match->Align and details of these measures: <http://www.cgl.ucsf.edu/chimera/docs/ContributedSoftware/matchalign/matchal… > <http://www.cgl.ucsf.edu/chimera/docs/ContributedSoftware/matchalign/matchal… > However, there are some issues that may affect whether you decide to use Chimera to calculate these values for your structures: (1) You would need to run Match->Align for each pair. There is no option to do all pairwise comparisons on multiple structures. You would need to script looping through all pairs (with python or shell scripting). (2) There is no Chimera command for Match->Align. Thus Match->Align would also need to be run via python. I don't have scripting expertise, so someone else would have to provide more details if you decide to try this. (3) Before you run Match->Align, the structures need to be superimposed. We purposefully made Match->Align independent of the superposition method. There are several possible ways to superimpose structures in Chimera, <http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/superposition.html> but probably the easiest in your case would be MatchMaker, which is also available as a Chimera command (matchmaker or mmaker, see that URL and links within). Usually the mmaker defaults work pretty well, for example Chimera commands: open 2mnr open 4enl mmaker #0 #1 (Then you could try running Match->Align interactively. The SDM, Q- score, etc. are reported in the Reply Log, opened with Favorites... Reply Log in the menu.) I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab Department of Pharmaceutical Chemistry University of California, San Francisco P.S. we recommend sending Chimera questions to chimera-users(a)cgl.ucsf.edu (I CC'd that list here after removing the details from your original mail) > -------- Original Message -------- > Subject: A question about your software(UCSF Chimera) > Date: Tue, 23 Mar 2010 21:55:06 -0400 > > Dear Dr. Ferrin, > > I am very interested in using your software UCSF Chimera, which have > some > commands that can do the job of aligning and measuring a distance > between two > protein structures. > > I am a PhD student at Purdue University working on the evolution of > protein > structure with Professor Peter Waddell. I was hoping to use your > structure > alignment software to obtain a pairwise structure distance matrix. > This > matrix > will then be used in phylogenetic analyses, comparing the trees and > treeness > of that structural distance compared to that produced by other > published > methods. > [...] > Could you please tell me if your structural alignment software can > easily > produce a complete pairwise distance matrix for a list of ~50 > structures? I did > not see a way to do this. If not, is there any easy way to modify it > to > do this? > [...] > > Best Regards and Sincerely, > Minming Li >

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Residue exposition cutoff
by Yasser Almeida Hernández 05 Apr '10

05 Apr '10

Hi all.... I have 2 question, beyond Chimera's issues. 1 - There is some cutoff value to consider a residue or more strictly, an atom exposed to the solvent?. 2 - Could i set a this cutoff using the area values and types (SR0, SC0 and SS0) from the DMS program output? 3 - Wich program you recommend to compute SAS? Thanks, best regards -- Yasser Almeida Hernández, BSc Center of Molecular Inmunology (CIM) Nanobiology Group P.O.Box 16040, Havana, Cuba Phone: (537) 214-3178 almeida(a)cim.sld.cu ---------------------------------------------------------------- Correo FENHI

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Possible bug in Chimera RMSD calculation
by Yasser Almeida Hernández 03 Apr '10

03 Apr '10

Hi all.... In Chimera , i selected a single pair of atoms for RMSD calculation with the command rms (rms #1:221.A@NE #0:221.A@NE) and it return the distance between the atoms ???? It would be a bug??? Please check this.... Thanks -- Yasser Almeida Hernández, BSc Center of Molecular Inmunology (CIM) Nanobiology Group P.O.Box 16040, Havana, Cuba Phone: (537) 214-3178 almeida(a)cim.sld.cu ---------------------------------------------------------------- Correo FENHI

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Coloring model represented as PipesAndPlanks
by Ibrahim Moustafa 01 Apr '10

01 Apr '10

Dear Chimera team, I have a problem with coloring different regions of the protein presented as PipesAndPlanks. I know I can change the colors of the SS elements from the menu of PipesAndPlanks. But, this is not what I want: I want to color different regions of the protein with different colors and not to be limited with the colors given to the SS. Before, I had no problem in doing so. I think this problem appeared in the recent updates. Something I noticed and could be related is that to change the presentation from the default chimera to PipesAndPlanks the new presentation assigned the same model# as the original model. I think, in previous versions the new presentation used to be given a new model#. Similarly, if I want to create a map for the model using (molmap) it is given the same model # rather than a new model# as used to be. I run Chimera version 1.4.1 (build 30282) on a Mac OSX 10.4 (PPC). Thanks for help. Ibrahim -- Ibrahim M. Moustafa, Ph.D. Biochemistry and Molecular Biology Dept. 201 Althouse Lab., University Park, Pennsylvania State University PA 16802 Tel. (814) 863-8703 Fax (814) 865-7927

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Daily build requirements
by sherden＠caltech.edu 31 Mar '10

31 Mar '10

So to get thermal ellipsoids to display from a .cif file (as opposed to a .pdb) it looks like I need version 1.50 or greater of Chimera, but it looks like versions of Chimera above 1.4x don't seem to run on my Mac (I have system 10.4.11). What OSX system version do I need so that I can run a version of chimera that I can get thermal ellipsoids to display from a .cif file? Or, conversely is there a way I can get one of the more recent daily builds to run on OSX system 10.4.11? --Nat (Nathaniel Sherden) California Institute of Technology

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Problem in Surface depiction
by Kshatresh Dutta Dubey 31 Mar '10

31 Mar '10

Dear All, I am using chimera 1.41 and 1.4 on a 3 GB Core 2 duo machine. When i draw surface for any ligand or residue then suddenly it get closed. This problem occurs in both versions 1.4 and 1.4.1. Kindly suggest me to fix this problem. Regards Kshatresh Dutta Dubey

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Re: [Chimera-users] named selections
by Elaine Meng 30 Mar '10

30 Mar '10

Hi Ajith, We are very happy to hear you will be the "Chimera guy" for your group, and that the tutorials are useful! But sometimes it is hard to find certain things, which is why we have the chimera- users(a)cgl.ucsf.edu list (recommended rather than sending mail to me individually). It sounds like you really want to use aliases rather than named selections. See the "alias" command: <http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/midas/alias.html> and also how to specify particular models, residues, chains, etc: <http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/midas/frameatom_spec.html > <http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/midas/atom_spec.html#hierar… > For example, to alias residues 10-42 and 55 in chain A and 80-100 in chain B: alias myresidues :10-42.a,55.a,80-100.b color red myresidues These would be the residue numbers in the structure, which are not always the same as in a sequence file. Session files are not friendly/intended for viewing as text. Aliases are saved in sessions, but you would just use the alias command without arguments to list the definitions of the existing aliases. I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab Department of Pharmaceutical Chemistry University of California, San Francisco On Mar 30, 2010, at 8:05 PM, Ajith Harish wrote: > Hi Elaine, > I will not bother you with too many questions after this last one > (at least for a while ;-)). There are a lot of features to explore > and I am playing with it and have learnt quite bit today. Also the > tutorials on the website are very helpful. I am soon going to be the > "Chimera Guy" of our group ;-) > > But there was one feature I could not figure out. Is it possible to > name sections without actually selecting the sequence from the GUI. > I need color different parts of large ensembles. Different domains > in multiple chains of a single pdb file. For now I open the sequence > of one chain at a time form the "Tools > sequence > sequence" and > then pick the residues (amino/nucleotide) based on the numbering > from the corresponding Fasta file from PDB and then name it from > "Select > Name Selection". Is it possible to assign names on a FASTA > file? > > I also looked into the session.py file. I could not relate the > numbers corresponding to my names in the session file to the residue > numbers or the residues. It would be great if I could assign names > in a file and then acess the names to color. Even better would be > assign colors to those named selections. > > Thanks much for your help. > Best wishes, > Ajith >

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Matching RGB color code from Adobe Illustrator
by Ajith Harish 30 Mar '10

30 Mar '10

Hello, I would like to color different regions of a molecule corresponding to RGB colors from Adobe Illustrator. Chimera RGB ranges from 0.000 to 1.000 where as the Illustrator RGB ranges from 0 to 255. Could you please let me know how these two scales are related? Thank you very much, Ajith

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Trouble with thermal ellipsoids
by sherden＠caltech.edu 30 Mar '10

30 Mar '10

I can't seem to get the thermal ellipsoids to work. I have a number of .cif files that are all perfectly good files (have been cif-checked) and all of which I know for a fact have anisotropic data as I can get thermal ellipsoids to display from these files in other programs like Diamond (which we are trying to move away from). But any time I select an atom or group of atoms and use either the "aniso" command or the "Show Thermal Ellipsoids" dialogue box I just get: "No atoms chosen had anisotropic information." This is just not true though, I can open up the .cif files in question and see the anisotropic data listed for the given atoms with my own two eyes. Any thoughts? I am probably doing something immensely stupid, that is usually the case with such situations. --Nat (Nathaniel Sherden) California Institute of Technology Department of Chemistry

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RMSD
by Beale, John 29 Mar '10

29 Mar '10

What is the best way to use Chimera to compute the RMSd value of an MD trajectory snapshot relative to the crystal structure of the protein? Thanks! John M. Beale, Jr., Ph,D. Professor of Medicinal Chemistry and Pharmacognosy St. Louis College of Pharmacy 4588 Parkview Place St. Louis, Missouri 63110 (314)-446-8461 Cell: (314)-315-0409 FAX (314) 446-8460 jbeale(a)stlcop.edu

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zones and residue name/number
by Francesco Pietra 29 Mar '10

29 Mar '10

Hi: I was trying to detect all residues (or atoms) within a given distance from a single-atom ligand in model #0 (PDB file). There are several such single-atom ligand atoms in model #0 (practically invisible in chimera as they are not shown at their relative vdw size), each specified by different residue and atom numbers. I want to carry out the task for each single-atom residue. Therefore I can't use the standard command select #0:single-atom-ligand z(or za)<given.distance because that applies to all those single-atom-ligands. Unless the residue can be specified differently (the residue number in place of residue name did not work), the only way that I found to come out was to set different names for the different single-atom ligands. Is anything better? Secondary question: is there any plan to support psf/dcd format (which I am now using for MD with namd) beyond reading movies? Thanks francesco pietra

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Converting SDF files to Mol2 Format
by Nancy 29 Mar '10

29 Mar '10

Hi Elaine, I need to convert a large number of PubChem SDF files into Mol2 format. When I convert an SDF file into Mol2 format, I add partial charges and run energy minimisation on the molecule, as this is necessary for the program I am inputting the files into. So far, I have only used Chimera in this method to convert individual files. Is there a way to convert a large number of SDF files to Mol2 format at once, and also preserve the filenames? Thanks in advance, Nancy

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Question related to chimera H-bond constraints
by snoze pa 26 Mar '10

26 Mar '10

Dear Chimera Users, I have a question related to number of hydrogen bonds. 1. When I am using the Relax H-bond constraints then chimera is showing 76 H-bonds as shown below figure (h bonds are shown in cyan color) http://img260.imageshack.us/img260/6467/screenshotau.png 2. If I will select the option color H bonds not meeting precise criteria differently, then still it shows 76 H bonds with some bonds that do not meet the criteria in red color http://img690.imageshack.us/img690/5607/screenshot1ks.png In 2, Why the red H bonds are different from 1 though H bonds are relaxed. If it is true then why chimera is showing these bonds in Relax H-bond constraints in 1. 3. However, if I will not choose the option to relax H bonds constraints then it is showing 50 H bonds as shown below http://img153.imageshack.us/img153/3822/screenshot2kr.png Thank you very much for your time and help. S

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Binding Pocket Internal Volume Calculation
by ppwanjari 24 Mar '10

24 Mar '10

Hello Everyone, I want to determine the inside volume of a pocket shaped molecule. Does anyone know how can I do it with Chimera? I am only able to measure volume of pocket-making atoms with Chimera, but not the inside volume. Thanks. Piyush

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Chimera crashes on my mac even after a reinstall
by David Chenoweth 23 Mar '10

23 Mar '10

Hi! I recently downloaded a new version of Chimera (Mac OS X (Cocoa, Intel, 64-bit)MD5: e54f53e4313817e26dbc68450bd5312d) and it's been running great until today. After using the program all day it finally crashed just as I was trying to save a session and I didn't get the crash message. I restarted the program and as soon as I tried to open a file the program crashed. I tried shutting my computer down and this didn't help so I deleted that version of chimera from my computer and downloaded it again. After reinstalling the program I still have the same problem and now I'm a bit stumped! I have a lot of work saved in session files from today and I can't seem to get the program to run at all. I am using a new 15 inch Macbook pro (OSX 10.6.2). Any suggestions? Thanks, Dave -------------------------------------------------------- David Chenoweth NIH Postdoctoral Fellow Swager Research Group Massachusetts Institute of Technology Chemistry Department, 18-053 77 Massachusetts Avenue Cambridge, MA 02139 Email: dcheno(a)mit.edu Lab Phone: 617-258-6537 --------------------------------------------------------

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Dimer construction from a monomer generated using Modeller
by akshita kumar 23 Mar '10

23 Mar '10

Dear Members, Using 1T3D as template, we have generated a homology model via Modeller. As the biological unit is a trimeric structure we need to generate trimer of the model too. Therefore we undertook structural alignment of the model and individual template 1T3D chains ("a, b , c"). However in our model the loop region that falls at the interface between two dimers is much longer and as a result the loops between dimer overlap each other. Can anybody please suggest a solution for generating a dimer/trimer from the monomer built using homology modelling. Thanks Akshita

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Re: [Chimera-users] Scripting to write / save multiple models into single pdf file
by Eric Pettersen 23 Mar '10

23 Mar '10

Hmm, it seems that you have the Model Panel set to autostart in your preferences. Now, Chimera probably should ignore autostarting tools when it is in nogui mode, but currently it doesn't. So what you will have to do for now (until we fix this) is to start Chimera normally, turn off the autostart of the Model Panel (and any other graphical tools probably), save the new preferences, and then run your script. If you look in the "Preferences" preference category, it will show the location of the preferences file. You could squirrel away your original preferences file somewhere, make the version with no autostarting, copy that somewhere, and then put your original version back. You would then be able to use the no-autostarting preferences by specifying it's location with the --preferences startup option. --Eric Eric Pettersen UCSF Computer Graphics Lab http://www.cgl.ucsf.edu On Mar 8, 2010, at 7:32 PM, Sumitro Harjanto wrote: > Hi Eric, > > Thanks for the suggestion. I don’t really script, I usually use a c+ > + code / excel to generate the command (.cmd) files. Should be okay > for the automation for now, if I run into any problem then I will > post it up here again. =] > > Mean while I try running the command “chimera.exe –nogui” in PATH/ > chimera/bin but got the following error message. I followed the > instruction and copy over the debug message (below). any advise? I’m > on a win7 X86 platform btw. > > Thanks, > Sumitro > > ----------------------------------------------------------------------------------------------------- > > Chimera failed abnormally; the exit code was: 1 > Use –debug command line option for the full error message. > > -------------------------------------------------------------------------------------------------- > Cannot execute 'gzip': no automatic decompression of .Z files > Traceback (most recent call last): > File "E:\Chimera\share\__main__.py", line 65, in <module> > value = chimeraInit.init(sys.argv) > File "E:\Chimera\share\chimeraInit.py", line 401, in init > extension.startup(startExtensions) > File "E:\Chimera\share\chimera\extension\base.py", line 1056, in > startup > manager.autostartTools(extNames) > File "E:\Chimera\share\chimera\extension\base.py", line 959, in > autostartTools > > emo.activate() > File "E:\Chimera\share\ModelPanel\ChimeraExtension.py", line 23, > in activate > display(self.module('base').ModelPanel.name) > File "E:\Chimera\share\chimera\dialogs.py", line 77, in display > dialog = find(name, create=1) > File "E:\Chimera\share\chimera\dialogs.py", line 62, in find > return d() > File "E:\Chimera\share\chimera\baseDialog.py", line 523, in __init__ > BaseDialog.__init__(self, master, *args, **kw) > File "E:\Chimera\share\chimera\baseDialog.py", line 244, in __init__ > self.fillInUI(self.__top) > File "E:\Chimera\share\ModelPanel\base.py", line 217, in fillInUI > self._addColumns() > File "E:\Chimera\share\ModelPanel\base.py", line 436, in _addColumns > self._buildTable() > File "E:\Chimera\share\ModelPanel\base.py", line 454, in _buildTable > % len(filter(lambda s: s == 1, self.shownColumns))) > File "E:\Chimera\bin\Lib\lib-tk\Tix.py", line 1306, in __init__ > cnf, kw) > File "E:\Chimera\bin\Lib\lib-tk\Tix.py", line 307, in __init__ > self.tk.call(widgetName, self._w, *extra) > _tkinter.TclError: invalid command name "tixScrolledHList" > Return code: 1 > Press return or enter to to exit >

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