Better reporting on plugin load failure
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
When ParaView fails to load a plugin that is selected with the Plugin Manager, you get the mostly unhelpful message "... is not a valid Qt plugin". There are a number of things that might have gone wrong such as incompatible Qt versions, incompatible ParaView versions, mismatched debug/release builds, or missing symbols when linking. It is hard to narrow down the problem without more information.