[rt-users] One more time, Upgrading RT from ancient version to current

[Ulf Zimmermann]

> > Etc, plugins and po are empty, html has Elements and Ticket
> > directories in it. Lib has a Ticket_Overlay.pm in it. As far I
> > remember we did have someone hire someone to add something to our
> RT
> > installation. I am trying to find out more about it.
> 
> There's your problem.
> 
> Your Ticket_Overlay.pm is killing RT's Ticket_Overlay.pm
> 
> Remove it until you can restore it as a proper extension using either
> Ticket_Local.pm or normal extensions.
> 
> -kevin

Yep, the custom modifications were the problem. We removed them on the test upgrade system and investigating how far we actually need those modifcations.