Dear all I am trying to use the T-Rex build-in functionality "open declaration" and "find references". Nothing seems to happen and after a while (hanging Eclipse) I get the following errors: I am using the plugin of T-Rex on Eclipse 3.7.2 . As recommended, I have increased the mem usage to 512m, but still seems to have no effect. I am using Subclipse for my TTCN script repo (which is relative large) and the default Java perspective (if that has anything to do with it). What I want to do here is to enable Eclipse to 'resolve' functions, declarations etc so that I can navigate through the code quicker - without having to manually look where a particular function is stored. I presume T-Rex should allow me to do this, right? Any thoughts that might help me figure what's wrong here? Cheers Jason