Hi I would just like to recap the events of today in the hope that someone might be able to help me and also that it will be useful for anyone else running into the same problems. I asked (wish I hadn’t now! ;-)) if there was a way of getting the System Log to display more logs than it does currently. Martin pointed out I should go to Admin Interface -> SysConfig -> Framework -> Core::Log -> LogModule Having established that I am using OTRS 2.3, which only stores 4k of sysLog data, Martin recommended I increase LogSystemCacheSize in the above module from 4k to (not above) 32k. So I clicked the element “LogSystemCacheSize” (which had been unclicked and greyed out) and changed its value from 4096 to 32000. From this point on, we have been unable to log on to OTRS; every time we do so we get the “Software Error” message Invalid argument at /opt/otrs/bin/cgi-bin/../../Kernel/System/Log.pm line 83, Martin suggested I look here http://faq.otrs.org/otrs/public.pl?Action=PublicFAQ&ItemID=111 though this doesn’t make much sense to me. Is it worth trying to understand this document in order to solve this problem? I found an old entry in the OTRS lists here http://lists.otrs.org/pipermail/otrs/2003-April/001346.html which talks about removing the “shared memory segment” and then rebooting the server. Marco suggested I might be able to remove the shared memory segment “maybe with some sysinternals tool” – I am not sure whether to go down this road. After further prompting from Marco and Michael we restarted the server, which is supposed to recreate a new shared memory segment. But this has had no effect – the same error message comes up. Is there anything else we can do short of reinstalling OTRS? Thank you for your patience