Hi George, The better approach to report Chimera problems is with Help... Report a bug in the menu, or this web form. <http://www.cgl.ucsf.edu/cgi-bin/chimera_bug_report_2.py> It will let you attach a file (and include your email address if you want feedback). In this case the trajectory file would be more useful than the error message. Also, I guess we would need both prmtop and trajectory, and I'm not sure if the approach above would let you attach both, so yet another possibility is to send email to chimera-bugs@cgl.ucsf.edu and attach both those files. Please also mention your Chimera version and what kind of computer you are using (e.g. Windows, Mac ...). Thanks, 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 Nov 28, 2011, at 2:37 AM, George Tzotzos wrote:
Yesterday I posted a message regarding Chimera issuing error messages on trying to open trajectory files.
The error was "TypeError: Attempt to form duplicate covalent bond."
I believe that the problem arises from the fact that in preparing the topology files with ANTECHAMBER (tleap) in AMBER, I generated disulfide bonds. My guess is that the problem lies there. Has anyone observed similar behaviour?
Best regards
George