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I added the a uml module from the Tools/Update Center menu and got the following linkage error upon restarting the IDE. A java.lang.LinkageError exception has occurred... [please report] The error appears to derive from the dom4j.jar module. Log file attached.
Created attachment 47850 [details] Log of installation error
I switched up to NB 6.0, which includes the UML install, and things seem to work.
Solved: Traced problem to differrent 'login' condition: Normally, I install plug-ins as 'myself', but in some cases, I needed to install a module globally, and I only had global write premissions as root. When I started netbeans as root, it found a different set of modules than when I was my normal user self, and the failure occurred