[rt-users] Extensions

[Sysadmin]

Is there an Extension compatibility list around. I recently installed 
the QueueDeactivatedScrip which work very well, then installed the 
EmailCompletion extention which also works well only to find that my 
QueueDeactivatedScrip no longer worked. I there anyway of determining 
compatibility between extensions?  or is it mostly trial and error? How 
do troubleshoot a broken Extension?

Thanks,

David
System Admin
RNS

Running RT 3.8.7