What steps will reproduce the problem? 1. Define an action that is of type void 2. Call action using the plug-in

What is the expected output? What do you see instead? Should receive a null object, but instead get an error thrown by container.

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Error is in lines 141-144 of GWTServlet.java:

    // if we got a respone, package it up for GWT
    if (callResult != null) {
        result = RPC.encodeResponseForSuccess(method, callResult);
    }

We need to encode the null response now with GWT 1.4.10.

I have attached a patch, new build (v0.2.1) is forthcoming.

This has been fixed in v0.2.1 of the plug-in