While trying to upgrade to latest GWT 2.8.2 and GXT 2.3.1a libraries, we are encountering the below error(PFA for full stack trace):

java.lang.ClassNotFoundException: 1C2DD3E7BC435105789300F99C966F9B

1C2DD3E7BC435105789300F99C966F9B: There is a gwt.rpc file created with the same name(PFA).

We are unable to understand which class the error talks about and what the rpc file name after ClassNotFoundExceptionmean.

Please share your insights on this.