Hi I work with IDL 6.1.1 in Windows and in Machintosh, and the DIALOG_MESSAGE functions, do not works in Machintosh with this IDL's version . I Verified that this functions works on a older version. But on the 6.1.1 version, IDL it's blocked when this function is used. Does anyone already had the same problem?? And Does someone know how i can solve it??