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When i open Netbeans IDE 5.5 pop up a message saying "A java.lang.NullPointerException has ocurred", and i can´t develop a J2SE aplication.
Please read http://qa.netbeans.org/bugzilla/reportbug.html and provide at least NPE stack trace (as an attachment).
rolandoliba, please provide requested informations and reopen, thanks in advance.