Running ooRexx 4.1.3 and ooDialog 18.104.22.16854 on 32 bit. On XP the system will crash, and on Win 7 it gives an error indicating the interpreter quit responding. The problem is due to a deadlock condition due to not using unguarded where needed. The test case is attached. Start and then click on OK - when the popup appears, key in any multiple keys - the second key that is keyed will show the problem.