On Oct 31, 2017, at 2:54 PM, Hernando J Sosa <hernando.sosa@einstein.yu.edu> wrote:

With the latest Chimera version (1.12) I get an error message after saving a file. The error says that the file does not exist (the file didn't exist as it is being created new). The file is saved OK though.

I have managed to reproduce this. It can happen if you use an “open” dialog and then later use a “save” dialog in the same session. I will work to fix it, though as you noted it is harmless (though annoying!).