thanks for letting me know and for filing the bug. I will try using a non-ajax button instead until the issue is solved.
I looked at the jira task (https://jira.jboss.org/jira/browse/RF-4509) and it is resolved, but I am still getting this error with RI 3.3.1.CR3.
I didn't understand, was that task really resolved or it will be in the final 3.3.1 release ?
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