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This bug was originally marked as duplicate of bug 226994, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE 8.0 Beta (Build 201401141042) VM: OpenJDK 64-Bit Server VM, 24.51-b03, OpenJDK Runtime Environment, 1.7.0_51-b31 OS: Linux User Comments: GUEST: After updating plugins, I wanted update them again and this shows up. I can not update any plugins. Stacktrace: java.lang.NoClassDefFoundError: org/netbeans/updater/XMLUtil at org.netbeans.modules.autoupdate.updateprovider.AutoupdateCatalogParser.newEntityResolver(AutoupdateCatalogParser.java:115) at org.netbeans.modules.autoupdate.updateprovider.AutoupdateCatalogParser.<init>(AutoupdateCatalogParser.java:84) at org.netbeans.modules.autoupdate.updateprovider.AutoupdateCatalogParser.getUpdateItems(AutoupdateCatalogParser.java:196) at org.netbeans.modules.autoupdate.updateprovider.AutoupdateCatalogProvider.getUpdateItems(AutoupdateCatalogProvider.java:143) at org.netbeans.modules.autoupdate.services.UpdateUnitFactory.appendUpdateItems(UpdateUnitFactory.java:173) at org.netbeans.modules.autoupdate.services.UpdateUnitFactory.getUpdateUnits(UpdateUnitFactory.java:143)
Created attachment 145682 [details] stacktrace
*** This bug has been marked as a duplicate of bug 240557 ***