I have a classic OTRS Windows installation. In the Apache Log file there are the following errors: [Wed May 19 10:56:45 2010] [error] [client 10.229.44.36] Use of uninitialized value $_ in -d at C:/PROGRA~1/OTRS/StrawberryPerl/perl/lib/CGI.pm line 4083. [Wed May 19 10:56:45 2010] [error] [client 10.229.44.36] Use of uninitialized value $_ in -d at C:/PROGRA~1/OTRS/StrawberryPerl/perl/lib/CGI.pm line 4083. [Wed May 19 10:56:45 2010] [error] [client 10.229.44.36] [Wed May 19 10:56:43 2010] index.pl: DBD::mysql::db do failed: Unknown system variable 'DATEFORMAT' at C:/Program Files/OTRS/OTRS/bin/cgi-bin/../../Kernel/System/DB.pm line 427. [Wed May 19 10:56:45 2010] [error] [client 10.229.44.36] ERROR: OTRS-CGI-10 Perl: 5.10.0 OS: MSWin32 Time: Wed May 19 10:56:43 2010 [Wed May 19 10:56:45 2010] [error] [client 10.229.44.36] [Wed May 19 10:56:45 2010] [error] [client 10.229.44.36] Message: Unknown system variable 'DATEFORMAT', SQL: 'SET DATEFORMAT ymd' [Wed May 19 10:56:45 2010] [error] [client 10.229.44.36] [Wed May 19 10:56:45 2010] [error] [client 10.229.44.36] Traceback (2440): [Wed May 19 10:56:45 2010] [error] [client 10.229.44.36] Module: Kernel::System::DB::Connect (v1.105.2.1) Line: 228 [Wed May 19 10:56:45 2010] [error] [client 10.229.44.36] Module: Kernel::System::DB::new (v1.105.2.1) Line: 188 [Wed May 19 10:56:45 2010] [error] [client 10.229.44.36] Module: Kernel::System::Web::InterfaceAgent::Run (v1.43.2.1) Line: 143 [Wed May 19 10:56:45 2010] [error] [client 10.229.44.36] Module: C:/Program Files/OTRS/OTRS/bin/cgi-bin/index.pl (v1.88) Line: 48 [Wed May 19 10:56:45 2010] [error] [client 10.229.44.36] And also in otrs.log there are this message: Wed May 19 11:09:59 2010][Error][Kernel::System::DB::Connect][228] Unknown system variable 'DATEFORMAT', SQL: 'SET DATEFORMAT ymd' What does it mean? Thanks Roberto