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NetBeans IDE 4.2 [] on jdk 1.5.0_03 When action Debug Main Project is invoked during background classpath scanning, a dialog box when main class is selected is opened with no classes provided. The dialogbox stays empty even after scan is completed. In some cases also NPE is thrown, when the action is invoked.
Created attachment 22352 [details] NPE exception stack trace
*** This issue has been marked as a duplicate of 59054 ***