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I can't install mobility pack. When I run netbeans_mobility-4_1-win.exe, I get the following message, and installation stops: an unhandled error occurred -- specify system property "is.debug" for more information.
netbeans-4_1 is installed, and works normally.
This problem happens on Turkish locale. What locale do you use? If Turkish switch to English install it and switch back. (But I think also IDE has problem with it.)
You can find more details in issue #52012. *** This issue has been marked as a duplicate of 52012 ***