Hi MJ, Sorry about the problems! Please use Chimera menu: Help... Report a Bug and attach any data (e.g. a session file or PDB file) and any instructions needed to reproduce the crash (e.g. the split command you used). Otherwise it is hard for us to diagnose/fix. Certainly it does not always crash whenever split is used. If the data needs to be kept private but you are willing to share with the Chimera(X) dev team, you can send it to just me (meng@cgl.ucsf.edu) or Tom Goddoard instead of attaching it to the bug report. As an alternative to split, you can open the structure multiple times and delete from each copy the "other" chains so that each copy just has the part that you want. We are concentrating on ChimeraX development now, and another possible alternative is to use ChimeraX instead Chimera. It has the same fitting as Chimera, and also a split command, although syntax is a little different. ChimeraX split: <https://rbvi.ucsf.edu/chimerax/docs/user/commands/split.html> ChimeraX fitting: <https://rbvi.ucsf.edu/chimerax/docs/user/tools/fitmap.html> <https://rbvi.ucsf.edu/chimerax/docs/user/commands/fitmap.html> I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco

On Sep 3, 2021, at 12:26 PM, Jeremy Jin via Chimera-users <chimera-users@cgl.ucsf.edu> wrote:

Hi,

When I use chimera, I want to split a mode, as long as I split, the software just crashes out.

It works very well before. Also it worked this morning, but after I split the model, fit to my map, it crashed out, then I restart, it showed the same problem. Then I re-installed the program, 2020-12-08 version, it crashed out even when I do split command.

Best Regards! MJ

MJ, Mingliang Jin Postdoc of Yifan Cheng’s Lab Genentech Hall, UCSF Missionbay Main Email: m.jin@msg.ucsf.edu Tel: 415-2835-171