I encountered an interesting (and frustrating issue) with the BlackBerry simulator in Eclipse. I got an error upon starting the simulator that the *.debug file was not found with some options to search and browse for it. Looking around my system showed that indeed – no *.debug files exist. I’ve tried many things, erasing all my Simulator Files, cleaning the build, re-building and so on, to nothing helped. Eventually I ran into this forum threadin the blackberry forums discussing this specific problem. It turns out that sometime, even though there are errors in the build – no errors will be shown, making you believe the build was successful. However, this is not the case. There should be an *.err file (were the *.debug file should have been) describing a compilation error in code.
Seeing that this came from the same error mentioned in the thread – _X is not Persistable: base Class does not implement net.rim.vm.Persistable_ , it might be that this specific error has a problem displaying in Eclipse.