You might get the UndefinedObject does not understand resume error when a packaged image starts, typically because the image was packaged with open sockets. SCI uses ACO which tries to terminate all outstanding futures on startup. The related resources are no longer valid and the image is in an inconsistent state.
There are two solutions:
aRuleCollector initializeToNilClassVariable: #Default inClassNamed: #SciSocketManager
SciSocketManager default closeAllSockets