I guessing you were doing Minimize and one or more charge computations on non-standard residues failed (or some non-standard atoms in standard residues had zero charge assigned).  You tried to continue on and got this error.  Is this right?  Regardless, filing a bug report as Elaine suggests would be the best course.

--Eric

                        Eric Pettersen
                        UCSF Computer Graphics Lab
                        http://www.cgl.ucsf.edu

On Dec 13, 2010, at 9:47 PM, Kshatresh Dutta Dubey wrote:

Dear All,
When i am trying to assign partial charge on a molecule, it is giving error something like this-

AttributeError: '_chimera.Atom' object has no attribute 'gaffType'
File "/opt/UCSF/Chimera64-1.5rc/share/WriteMol2/__init__.py", line 289, in writeMol2
atomType = atom.gaffType

I am using chimera 1.5 on linux 64-bit

Kindly help to resolve this problem
Thanks in advance
kshatresh
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