[solve] ubuntu upgrade 11.10 to 12.04 hi, i have upgrade my dist ubuntu 11.10 to 12.04, an i have a probleme with ispconfig 3.0.4.6 on the cron queue of ispconfig: Code: 03.08.2012-22:19 - DEBUG - Set Lock: /usr/local/ispconfig/server/temp/.ispconfig_lock 03.08.2012-22:19 - DEBUG - Found 507 changes, starting update process. 03.08.2012-22:19 - DEBUG - Unable to register function 'install' from plugin 'aps_plugin' for event 'aps_instance_insert' 03.08.2012-22:19 - DEBUG - Unable to register function 'install' from plugin 'aps_plugin' for event 'aps_instance_update' 03.08.2012-22:19 - DEBUG - Unable to register function 'delete' from plugin 'aps_plugin' for event 'aps_instance_delete' 03.08.2012-22:20 - DEBUG - There is already a lockfile set. Waiting another 10 seconds... 03.08.2012-22:20 - DEBUG - There is already a lockfile set. Waiting another 10 seconds... 03.08.2012-22:20 - DEBUG - There is already a lockfile set. Waiting another 10 seconds... 03.08.2012-22:20 - DEBUG - There is already a lockfile set. Waiting another 10 seconds... 03.08.2012-22:20 - DEBUG - There is already a lockfile set. Waiting another 10 seconds... 03.08.2012-22:20 - DEBUG - There is already a lockfile set. Waiting another 10 seconds... 03.08.2012-22:21 - DEBUG - There is already a lockfile set. Waiting another 10 seconds... 03.08.2012-22:21 - DEBUG - There is already an instance of server.php running. Exiting. i delete the lock file, but the same probleme next time appear do you have an idea for solve this ? thanks --- edit------ bug into ispconfig 3.0.4.6 PHP Fatal error: Call to undefined method plugins::registerAction() in /usr/local/ispconfig/server/plugins-available/backup_plugin.inc.php on line 54 i comment the two lines who call this function.