Server stack trace would be interesting. Looks like a NullPointerException on server side.
Extend RequestFactoryServlet and then use the protected super constructor which allows you to provide a custom ExceptionHandler. The custom ExceptionHandler could log the server exception to see whats going on. Without it, RF just converts server exceptions into ServerError instances that only contain the exception message but not the server side exception stack trace. -- J. -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscr...@googlegroups.com. To post to this group, send email to google-web-toolkit@googlegroups.com. Visit this group at http://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/groups/opt_out.
