Hi all, After upgrading OTRS v2.0.4 to v2.2.6 using the instructions in UPGRADING, my OTRS fails with the following error: Can't use an undefined value as a HASH reference at ../..//Kernel/System/Ticket/Article.pm line 1409. Google leads me to the following FAQ entry, which suggests this problem occurs after an upgrade to v2.2.2: http://faq.otrs.org/otrs/public.pl?Action=PublicFAQ&ItemID=192 It suggests that I run the following sql to fix this: ALTER TABLE ticket ADD escalation_response_time INTEGER; ALTER TABLE ticket ADD escalation_solution_time INTEGER; This fails, because the columns have already been added by the DB migration script. Does anyone have any further reasons why this error should occur, apart from the missing columns referred to in the FAQ, which in this case are not missing? Regards, Graham --