Hi Christopher, If you have 10 models open in a Chimera session and you close model number 7, the session should still save correctly. If it doesn't please report it as a bug. Unfortunately restoring the session file uses different model numbers for the density maps (the lowest available numbers). That is a bug that I need to fix. It should use all of the original model numbers even if there are gaps. Even though the model numbers will change, the orientations of all the models 1-6 and 8-10 will all be correct in the restored session. I sent your earlier email to our Chimera users mailing list. That is why your reply to me went to that mailing list. I like to post the questions to the mailing list so others can benefit from the answer and I remove any confidential information (email, phone, signature line, research details). Let me know if you want to keep your questions off of the Chimera mailing list. Here's the message where I posted your original question and my reply. http://www.cgl.ucsf.edu/pipermail/chimera-users/2007-February/001366.html Tom Christopher Akey wrote:

Thomas -

This went via reply to some kinda list, sorry.

I will try some of these approaches. However, there is a question. If you have 10 objects in a session, and decide to delete number 7, then sometimes you cannot get the session to save properly with a missing number.

In theory, if one could get the session to save, then a matrix for the first 6 objects would still work?

cheers C Akey