I think, that this is a mess. During my attempts to create an image I got all errors I've read here in this forum - which takes pretty much time and creates a fear of packaging ...
Then I solved all the known problems and got a PoolDictionary problem - SstHttpContants was throwing an exception (in the packaged runtime) complaining about a missing element. I looked into the image content - of that packager - and I marked the defining application as NOT to reduce - no solution.
Then I looked at all defined rules for that runtime - and removed the global "reduce pool dictionary" rule - and then the runtime was working ok.
Now I am on the way to create a runtime without GUI - with all the problems I mentioned in another thread ...