Hi, Thanks for tracking my patch. Although I don't know how jde uses timer functions, it doesn't seem to happen by the itimer.el bug which I raised. It is more likely that such an error occurs when starting a timer with the zero argument or restarting a timer which has been reached to the specified time. I couldn't find the former case in the jde package but I found a code which looks like a bug in jde-parse.el. It may create zombie timers having the zero value: --- jde-parse.el~ 2003-01-26 22:08:11 +0000 +++ jde-parse.el 2004-01-29 04:41:17 +0000 ＠＠ -135,7 +135,7 ＠＠ (if (timerp jde-auto-parse-buffer-timer) (let ((rem (jde-auto-parse-delay))) (cond - ((< rem 0) + ((<= rem 0) ;; Timer has expired, re-schedule a new auto-parse. (cancel-timer jde-auto-parse-buffer-timer) (setq jde-auto-parse-buffer-timer nil)) I'm not sure whether this is related to Hans-Joachim's problem, though. Regards, -- Katsumi Yamaoka <yamaoka(a)jpl.org&gt;