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When I changed the platform from the default (jdk5) to jdk1.4.2 for my webapp project, nb started scanning the jars. I believe it was while scanning rt.jar that nb suddenly stopped without warning. It wrote a hs_err_pid1064.log in the nb folder (attachment). When I restarted I got the "allready running" message.
Created attachment 18375 [details] error log
Well it's a JVM crash; probably nothing we can do about it unless there is some way to reproduce. You are however encouraged to file the VM error log on Sun's Java bug reporting page.
No info to reproduce.
Reorganization of java component