Hi, I was trying to run the following script (below), which calculates RMSDs between 39 pdb models. Total iteration will be 741 with about 3000 match commands. After it has run for about 10 mins chimera will crash with an error: Chimera failed abnormally; the exit code was 3. I've printed the debug lines below the script: Any suggestions..? Cheers, Sumitro -------------------------------------------------------- open d:\result\pdb\1B0G.pdb open d:\result\pdb\1DUZ.pdb match #0:1-9.C@ca #1:1-9.C@ca match #0:1-9.C@n,ca,c,o #1:1-9.C@n,ca,c,o match #0:1-2.C,8-9.C@ca #1:1-2.C,8-9.C@ca match #0:1-2.C,8-9.C@n,ca,c,o #1:1-2.C,8-9.C@n,ca,c,o close #1 open d:\result\pdb\1EEY.pdb match #0:1-9.C@ca #1:1-9.C@ca match #0:1-9.C@n,ca,c,o #1:1-9.C@n,ca,c,o match #0:1-2.C,8-9.C@ca #1:1-2.C,8-9.C@ca match #0:1-2.C,8-9.C@n,ca,c,o #1:1-2.C,8-9.C@n,ca,c,o close #1 open d:\result\pdb\1EEZ.pdb match #0:1-9.C@ca #1:1-9.C@ca match #0:1-9.C@n,ca,c,o #1:1-9.C@n,ca,c,o match #0:1-2.C,8-9.C@ca #1:1-2.C,8-9.C@ca match #0:1-2.C,8-9.C@n,ca,c,o #1:1-2.C,8-9.C@n,ca,c,o close #1 open d:\result\pdb\1HHG.pdb match #0:1-9.C@ca #1:1-9.C@ca match #0:1-9.C@n,ca,c,o #1:1-9.C@n,ca,c,o match #0:1-2.C,8-9.C@ca #1:1-2.C,8-9.C@ca match #0:1-2.C,8-9.C@n,ca,c,o #1:1-2.C,8-9.C@n,ca,c,o close #1 open d:\result\pdb\1HHI.pdb match #0:1-9.C@ca #1:1-9.C@ca match #0:1-9.C@n,ca,c,o #1:1-9.C@n,ca,c,o match #0:1-2.C,8-9.C@ca #1:1-2.C,8-9.C@ca match #0:1-2.C,8-9.C@n,ca,c,o #1:1-2.C,8-9.C@n,ca,c,o close #1 ... ... ... -------------------------------------------------------- initializing general preferences loading Tix initializing graphics create application loading Pmw creating main window creating menus creating toolbar creating viewer initializing OpenGL initializing preferences initializing dialogs initializing COM initializing extensions CloneMenu failed inside of MenuAddOrInsert. This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information. Return code: 3 Press return or enter to to exit --------------------------------------------------------