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java.lang.NoClassDefFoundError: javax/vecmath/Vector3f at org.netbeans.modules.plethora.utils.Installer.restored(Installer.java:51) at org.netbeans.core.startup.NbInstaller.loadCode(NbInstaller.java:366) [catch] at org.netbeans.core.startup.NbInstaller.load(NbInstaller.java:282) at org.netbeans.ModuleManager.enable(ModuleManager.java:904) at org.netbeans.core.startup.ModuleList.installNew(ModuleList.java:383) at org.netbeans.core.startup.ModuleList.trigger(ModuleList.java:317) at org.netbeans.core.startup.ModuleSystem.restore(ModuleSystem.java:250) at org.netbeans.core.startup.Main.getModuleSystem(Main.java:212) at org.netbeans.core.startup.Main.start(Main.java:383) at org.netbeans.core.startup.TopThreadGroup.run(TopThreadGroup.java:96) at java.lang.Thread.run(Thread.java:595) Phobos debug enabled on System.err
*** This issue has been marked as a duplicate of 112527 ***