While testing after upgrading from 2.0 beta 4 to 2.0.1 I have found a problem. I created two tickets then tried to merge them. I get the following error:

Software error:

Can't call method "LockSet" on an undefined value at ../..//Kernel/System/Ticket.pm line 3720.

For help, please send mail to the webmaster (webmaster@localhost), giving this error message and the time and date of the error.

Thank you for any help,

-- 
Ken Kilgore
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When life hands you lemons just grab the salt and pass the Tequila.