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I got a stack overflow when opening the list manager java source from the mail list app in Apple's enterprise java examples
Created attachment 38640 [details] Messages Log
Did it happen only once or is it happening every time you try to open the mentioned source? Could you please try to start your IDE with clean userdir? netbeans --userdir <path_to_new_userdir>
It's duplicate of issue 86635. Thanks for your report anyway *** This issue has been marked as a duplicate of 86635 ***