Hi, I am running OTRS version 3.2.7 on CentOS 6.4. Crontab entries for user OTRS in http://fpaste.org/14898/36972020/. I always get these errors in /var/log/otrs.log file [Tue May 28 11:08:02 2013][Notice][Kernel::System::PID::PIDCreate] Can't create PID PostMasterMailbox, because it's already running ( otrs.mydomain.com/13176)! [Tue May 28 11:10:39 2013][Notice][Kernel::System::PID::PIDCreate] Can't create PID PostMasterMailbox, because it's already running ( otrs.mydomain.com/13176)! [Tue May 28 11:10:39 2013][Notice][Kernel::System::PID::PIDCreate] Can't create PID PostMasterMailbox, because it's already running ( otrs.mydomain.com/13176)! [Tue May 28 11:11:02 2013][Notice][Kernel::System::PID::PIDCreate] Can't create PID PostMasterMailbox, because it's already running ( otrs.mydomain.com/13176)! [Tue May 28 11:12:01 2013][Notice][Kernel::System::PID::PIDCreate] Can't create PID PostMasterMailbox, because it's already running ( otrs.mydomain.com/13176)! [Tue May 28 11:13:01 2013][Notice][Kernel::System::PID::PIDCreate] Can't create PID PostMasterMailbox, because it's already running ( otrs.mydomain.com/13176)! [Tue May 28 11:14:02 2013][Notice][Kernel::System::PID::PIDCreate] Can't create PID PostMasterMailbox, because it's already running ( otrs.mydomain.com/13176)! [Tue May 28 11:15:01 2013][Notice][Kernel::System::PID::PIDCreate] Can't create PID PostMasterMailbox, because it's already running ( otrs.mydomain.com/13176)! [Tue May 28 11:16:02 2013][Notice][Kernel::System::PID::PIDCreate] Can't create PID PostMasterMailbox, because it's already running ( otrs.mydomain.com/13176)! [root@otrs log]# Please let me know if there are any extra entries in the cron table pasted in http://fpaste.org/14898/36972020/ which is causing the above issue. Regards, Kaushal