Lucky me. I checked newest Wicket release (1.4.14) and saw bugfix about Radio button. https://issues.apache.org/jira/browse/WICKET-3175
My bug occurred because we use one page for everything. That solution worked like a charm. -- View this message in context: http://apache-wicket.1842946.n4.nabble.com/RadioGroup-Radio-runtime-exception-tp2331304p3089098.html Sent from the Users forum mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org