Nullpointer exception when invoking rest call on mocked serv

Dear all,

When I try to invoke a call on the mocked rest service i get the following exception:

11:15:17,867 INFO  [log] Retrieved request/csdb-mock/hu/testother/startwith content null
11:15:17,867 INFO  [log] Grabbed muid testother of request
11:15:17,883 INFO  [log] DONE
11:15:17,899 INFO  [log] Retrieved response2012-04-26 11:15:17.852: [dispatch error; missing response]
11:15:17,899 ERROR [SoapUI] An error occured [java.lang.NullPointerException], see error log for details
java.lang.NullPointerException
 at com.eviware.soapui.tools.SoapUIMockServiceRunner$LogListener.onMockResult(SoapUIMockServiceRunner.java:230)
 at com.eviware.soapui.impl.wsdl.mock.WsdlMockRunner.dispatchRequest(WsdlMockRunner.java:396)
 at com.eviware.soapui.monitor.JettyMockEngine$ServerHandler.handle(JettyMockEngine.java:714)
 at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
 at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
 at org.mortbay.jetty.Server.handle(Server.java:326)
 at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
 at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:945)
 at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:756)
 at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
 at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
 at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410)
 at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
 at java.lang.Thread.run(Thread.java:662)

I started the Mocked service via maven, the plugin is configured as follows:

            <plugin>
                <groupId>eviware</groupId>
                <artifactId>maven-soapui-plugin</artifactId>
                <configuration>
                    <projectFile>
                        ${basedir}/src/SoapUI/CSDB-Mock-soapui-project.xml
                    </projectFile>
                    <host>http://127.0.0.1</host>
                    <port>8080</port>
                </configuration>
            </plugin>

The plugin version I'm using is 4.5.0-SNAPSHOT.

The onRequest script is as follows:

import com.eviware.soapui.impl.wsdl.mock.WsdlMockResult

WsdlMockResult mockResult = new WsdlMockResult( mockRequest );

if(mockRequest.method == "PUT") {
 // Retrieve MUID of request
 String muid = mockRequest.getPath().tokenize('/')[2]

     log.info "Retrieved request" + mockRequest.path + "with content "+ mockRequest.requestContent ;
 log.info "Grabbed muid " + muid + " of request"
 
 switch (muid) {
     case "test":
      mockRequest.httpResponse.status = 500
      ;
      break
     default:
         mockRequest.httpResponse.status = 204;
 }  
} else {
 //log.warn "Received invalid request for CSDB notification"
 log.info "Retrieved request" + mockRequest.path;
 mockRequest.httpResponse.status = 405;
}
log.info "DONE"
return mockResult;

What am I doing wrong?

Thanks,
Mark