John -- yes, the "#" files appear to be autosaves. And thanks for the fallback DVI, etc., suggestion.

After testing, I see that:

"emergency" files are created if there is a crash.
"~" files are "archive" backups of the last "saved" version. (These appear beginning with the second "save".) "#" are "autosave" backups; they get updated if the file changes before the backup interval (set in preferences) expires. These files are deleted by a "save" operation. So, if a "#" exists, it is more recent than a "~" file.

So, the time ordering of the files would be, beginning with most recent (and assuming they exist):
"emergency" files
"#" files
"~" files

humanengr


On Thu, Jul 2, 2009 at 2:11 PM, humanengr<humane...@gmail.com> wrote:
 > Does anyone know what role the "#" are supposed to play?

These appear to be autosaves.

Also there is yet another type of file you can recover from. If you
have done a view DVI etc, there is also likely to be a .tex file
sitting somewhere in your tmp directory. You can then import that .tex
file back into LyX. This saved me from retyping a couple of paragraphs
of math once.

--
John C. McCabe-Dansted
PhD Student
University of Western Australia

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