Mmm... From the use of ":" as path separator, and the fact that "/cygwin/" is omitted, it almost looks like AUCTeX is seeing your machine as a Linux one...
If you issue "C-h v system-configuration", what value do you get? _______________________________________________ bug-auctex mailing list bug-auctex@gnu.org https://lists.gnu.org/mailman/listinfo/bug-auctex