[Chimera-users] Attribute Error: 'AtomType' object has no attribute 'amber_atom_type'

Eric Pettersen pett at cgl.ucsf.edu
Mon Jun 22 12:44:32 PDT 2015

Hi Karl,
	We have not encountered this behavior.  Do you have a session or PDB file where this happens reliably for you?  If so,  could you use Chimera's Help->Report A Bug and attach the file?  I can keep the data private if that's an issue.


                        Eric Pettersen
                        UCSF Computer Graphics Lab

On Jun 19, 2015, at 3:32 PM, Karl Sebby <karl.sebby at leftsideresearch.com> wrote:

> Hi
> I am modifying several ligand/protein complexes; usually with the “Build Structures” tool. I modify ligands by changing and deleting atoms, or by using “Join Models” after building or importing a structure with “Start structure”. Sometimes, minimizing the ligand works fine, but other times I get the error: “Attribute Error: ‘AtomType’ object has no attribute ‘amber_atom_type’”. I cannot figure out what is causing this error or how to fix it. It seems to happen when I begin working from a saved session or a pdb that was written with the ‘write’ command and not when I go through a whole series of steps in one shot. Any ideas on what is going on? Thanks,
> All the best,
> Karl
> --
> Dr Karl Sebby
> Left Side Research LLC
> 1661 K M Ranch Road
> Whitefish Montana 59937
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