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[release40-200411150946, JDK 1.5.0_01, JDS] Cannot say for sure when the NullPointerException was thrown because it might be in the status bar for some while, but I was working with j2seproject (expanding in Explorer, opening properties) that had jar from freeform project on its classpath. It happened after IDE restart.
Created attachment 18968 [details] exc stack trace
Have seen a similar exception reported before, but no known pattern for it. No idea how to solve it either. Just some odd exception deep inside Xerces code. *** This issue has been marked as a duplicate of 50198 ***
Verified dupe. Closing.