The following message is a courtesy copy of an article that has been posted to comp.emacs.xemacs as well. Robert> I'm using Robert> XEmacs 21.4 (patch 3) "Academic Rigor" [Lucid] Robert> (i586-pc-win32) of Thu May 17 2001 on SHALOM on a Windows Robert> 95 machine. Robert> When backup-by-copying is set, saving a file yields Cannot Robert> write backup file; backing up in ~/%backup%~ but in fact Robert> both the expected backup file and ~/%backup% end up Robert> existing. Robert> A little exploration seems to indicate that when the Robert> fourth argument to copy-file (KEEP-TIME) is set, various Robert> I/O errors occur... at least on my machine. Robert> The reason I was looking at backup-by-copying is that I Robert> was getting weird behavior of, say, SYSTEM.INI and Robert> SYSTEM.INI~ being the *same* file (which I didn't know was Robert> possible on MS-Windows systems). It was bad when I Robert> deleted the backup, only to find I had no system.ini file. Robert> This is reproducible. Hello Robert, yes this is a bad bug. 21.5-b1 and 21.4.4 will have fixes for this problem. Best regards, Adrian Robert> Best, Robert> Robert -- Adrian Aichner mailto:adrian＠xemacs.org http://www.xemacs.org/