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l see this window when, i modify a file A java.lang.NullPointerException exception has occurred. Please report this at http://www.netbeans.org/community/issues.html, including a copy of your messages.log file as an attachment. The messages.log file is located in your C:\Documents and Settings\Jomag\.netbeans\5.5beta2\var\log folder.
Created attachment 35569 [details] error
Thanks for the report, sorry for the delayed response.
There are more exception, but the NPE comes from mdr - reassigning
I am closing all reports in category Java/Unsupported as wontfix. These should be dead issues --- if the reported cases are against some live part of the NetBeans IDE please reopen and we can discuss to which category they belong.