One follow up observation and an additional problem based on the following correspondence table:
Windows Dir
ignore_string
c:\TEMP
"c:/TEMP"
d:\TEMP
"d:/TEMP"
On Windows machines, it looks like vim-prosession does not care about the drive-letter, and saves the session into %TEMP.vim regardless of where GVIM is launched.
On Windows machines, it looks like
vim-prosession
does not care about the drive-letter, and saves the session into%TEMP.vim
regardless of where GVIM is launched.