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This bug was originally marked as duplicate of bug 247884, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE Dev (Build 201506130001) VM: Java HotSpot(TM) Client VM, 25.45-b02, Java(TM) SE Runtime Environment, 1.8.0_45-b14 OS: Linux User Comments: rweaver: Looking at WordPress plugin and seeing if I could activate it CrispyDuck: I'm trying to activate Vaadin plugin. java.lang.IllegalStateException: Module org.netbeans.api.progress/1 is already enabled at org.netbeans.ModuleManager.attachModuleFragment(ModuleManager.java:1019) at org.netbeans.ModuleManager.maybeAddToEnableList(ModuleManager.java:1585) at org.netbeans.ModuleManager.maybeAddToEnableList(ModuleManager.java:1595) at org.netbeans.ModuleManager.simulateEnable(ModuleManager.java:1534) at org.netbeans.ModuleManager.simulateEnable(ModuleManager.java:1508) at org.netbeans.modules.autoupdate.services.OperationValidator$EnableValidator.getModulesToEnable(OperationValidator.java:363) at org.netbeans.modules.autoupdate.services.OperationValidator$EnableValidator.getRequiredElementsImpl(OperationValidator.java:398) at org.netbeans.modules.autoupdate.services.OperationValidator.getRequiredElements(OperationValidator.java:131) at org.netbeans.modules.autoupdate.services.OperationContainerImpl$OperationInfoImpl.getRequiredElements(OperationContainerImp GUEST: Installing TikiOne JaCoCoverage [1.5.1.20150301.1800] palman: fresh install netbeans dev, try to open java ee project GUEST: user installed plugins activaation Stacktrace: java.lang.IllegalStateException: Module org.netbeans.api.progress/1 is already enabled at org.netbeans.ModuleManager.attachModuleFragment(ModuleManager.java:1019) at org.netbeans.ModuleManager.maybeAddToEnableList(ModuleManager.java:1585) at org.netbeans.ModuleManager.maybeAddToEnableList(ModuleManager.java:1595) at org.netbeans.ModuleManager.simulateEnable(ModuleManager.java:1534) at org.netbeans.ModuleManager.simulateEnable(ModuleManager.java:1508) at org.netbeans.modules.autoupdate.services.OperationValidator$EnableValidator.getModulesToEnable(OperationValidator.java:363)
Created attachment 154199 [details] stacktrace
*** This bug has been marked as a duplicate of bug 252928 ***