Hello Michael, from time to time I run into problem with ClearCase, e.g. when I try to hijack a file. I then get an error and the file is not updated (although it is hijacked). I have a debug for this: Debugger entered--Lisp error: (wrong-type-argument number-char-or-marker-p t) clearcase-utl-touch-file("D:\\ws\\Sources\\adc.c") clearcase-hijack("D:\\ws\\Sources\\adc.c") #<compiled-function nil "...(4)" [buffer-file-name clearcase-hijack] 2 ("c:\\Programme\\XEmacs\\xemacs-packages\\lisp\\clearcase\\clearcase.elc " . 26474) nil>() call-interactively(clearcase-hijack-current-buffer) recursive-edit() byte-code("..." [buffer-read-only noninteractive debugger-buffer middlestart debugger-args debugger-batch-max-lines pop-to-buffer debugger-mode debugger-setup-buffer count-lines 2 "...\n" message buffer-string kill-emacs debug backtrace-debug 3 t debugger-reenable "" nil recursive-edit standard-output] 3) After running in those problems I get regularly itimer error signals. Debug information for those is here: Debugger entered--Lisp error: (error "Selecting deleted or non-existent buffer") clearcase-post-update-check-process-buffer(#<killed buffer>) clearcase-utl-list-filter(clearcase-post-update-check-process-buffer (#<killed buffer>)) clearcase-post-update-timer-function() apply(clearcase-post-update-timer-function nil) byte-code("..." [this-command inhibit-quit quit-flag match-data itimer current-itimer match-data ((store-match-data match-data)) nil itimer-uses-arguments apply itimer-function itimer-function-arguments last-event-time next-wakeup itimers time-elapsed] 5) itimer-run-expired-timers(13.953) itimer-timer-driver(nil) I hope you can use the probided information to solve the problem. Kind regards, Frank Emacs: XEmacs 21.4 (patch 13) "Rational FORTRAN" [Lucid] (i586-pc-win32) of Sun May 25 2003 on TSUNAMI Package: clearcase.el </main/laptop/156> current state: ============== (setq system-type 'windows-nt system-configuration "i586-pc-win32" emacs-version "21.4 (patch 13) \"Rational FORTRAN\" XEmacs Lucid" clearcase-clearcase-version-installed "ClearCase version 2002.05.00 (Tue Oct 30 08:27:59 2001)\nclearcase patch p2002.05.00.NT-16 (Mon Mar 17 16:45:02 2003)\nclearcase patch p2002.05.00.NT-21 (Thu Apr 24 15:54:17 2003)\nclearcase patch p2002.05.00.NT-22 (Thu Apr 24 16:17:23 2003)\nclearcase patch p2002.05.00.NT-23 (Mon Jun 16 13:44:05 2003)\nclearcase patch p2002.05.00.NT-24 (Sun Jul 6 21:59:28 2003)\nclearcase patch p2002.05.00.NT-25 (Wed Sep 24 11:53:01 2003)\nclearcase patch p2002.05.00.NT-26 (Wed Sep 24 20:12:12 2003)\nclearcase patch p2002.05.00.NT-27 (Tue Dec 9 14:37:31 2003)\n＠(#) MVFS version 2002.05.00+ (Sep 8 2003 18:46:11)cleartool 2002.05.00+ (Thu Dec 4 13:26:05 2003)\ndb_server 2002.05.00+ (Fri Nov 7 12:08:38 2003)\nVOB database schema version: 54" clearcase-cleartool-path "C:\\Programme\\Rational\\ClearCase\\bin\\cleartool.exe" clearcase-lt nil clearcase-v3 nil clearcase-v4 nil clearcase-v5 t clearcase-v6 nil clearcase-servers-online t clearcase-disable-tq '(windows-nt ms-windows cygwin cygwin32) clearcase-on-cygwin nil clearcase-setview-root nil clearcase-suppress-vc-within-mvfs t shell-file-name "C:\\WINDOWS\\system32\\cmd.exe" )