java.lang.RuntimeException: The RequestFactory ValidationTool must be run for the com.rf.test.client.ApplicationRequestFactory RequestFactory type

Hi all.

Please help me.

i am created Gwt Web application using GWT RequestFactory ,but when
ever i am run the application then

getting below error: why?

java.lang.RuntimeException: The RequestFactory ValidationTool must be
run for the com.rf.test.client.ApplicationRequestFactory
RequestFactory type

please tell me anybady

Thanks in Advace.
Thanks&Regards
Laxman

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