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You can create a diagram and save it, but when you try to close and reopen it you can't. The "solution" is install a plugin (for example Web Applications) wich contains the sjsxp.jar or put it in the class path. Regards. Franco Catena.
I forgot attach a stacktrace, this is the report (Exception Report #149904) http://statistics.netbeans.org/analytics/detail.do?id=149904. Regards. Franco Catena.