I have the answer. With help from the folks at Google I was told that the underlying problem was a ClassNotFoundException for isSerializable from the GWT toolkit.
This explains why my other app worked ok, because it contained the GWT jar. This also means that the true problem was being masked by the Appengine and this was the cause of my woe. Apparently very soon they will be allowing the root cause for these kinds of problems to be seen so that this masking of errors won't occur in the future. FTW! Thanks Google team, I'm happy to be moving forward again. -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
