[Chimera-users] Problem in Surface depiction

Elaine Meng meng at cgl.ucsf.edu
Wed Mar 31 09:04:36 PDT 2010

Hi Kshatresh,
Although we are aware of problems calculating some surfaces, this  
sounds like a different problem because the others would not stop  
Chimera, and they only happen for some fraction of structures, not all  
the time as you suggest.

Your problem is more likely with the graphics driver on your machine.   
It is better to use "Help... Report a Bug" in the Chimera menu to  
report these problems (not sending mail to chimera- 
users at cgl.ucsf.edu), because that would send us details about your  

However, some things you could try are
- updating your graphics driver
- in Chimera, set Preferences (under Favorites), General category,  
"Debug OpenGL on startup" to "true", click Save.  Exit Chimera and  
restart, and then in the debug dialog, turn off "VertexBufferObject"

Although it doesn't sound like you are having the other surface  
problems I mentioned, they and some workarounds are discussed here:

I hope this helps,
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 31, 2010, at 4:18 AM, Kshatresh Dutta Dubey wrote:

> 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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