Hello. I just installed the software on a Unix FreeBSD; Perl 5.8.6; MySQL 4.0.18; Apache 1.3.33 system. I haven't added any other options from Defaults.pm, yet, except as it pertains to the following: After otrs/bin/cgi-bin/index.pl, I obtained the 'Software Error: Invalid argument at /usr/home/foo/public_html/otrs/bin/cgi-bin/../../Kernel/System/Log.pm line 80.'. I looked at other mailing list entries but haven't found the cause. Therefore, I ran the Perl Debug and it shows Line 80 in Log.pm as: $Self->{Key} = shmget($Self->{IPCKey}, $Self->{IPCSize}, 0777 | 0001000) || die $!; I also looked at the following lines from that file: $Self->{IPCKey} = "444423".$Param{ConfigObject}->Get('SystemID'); $Self->{IPCSize} = $Param{ConfigObject}->Get('LogSystemCacheSize') || 4*1024; and then I looked in Config.pm and saw that there is no reference to 'LogSystemCacheSize'. I did see a reference to it in Defaults.pm. I then added it to the Config.pm file and the error was still there. I also see that the otrs.log has not been created via the script. I have the relative location as '/var/log/otrs.log'. Is there something else I need to do e.g. reboot, etc.? Is this 'log.pm line 80', as numbered by the debugger, really the problem? Thanks in advance.