This issue was reported manually by mmirilovic.
It already has 31 duplicates 


Build: NetBeans IDE 7.1.2 (Build 201204101705)
VM: Java HotSpot(TM) 64-Bit Server VM, 23.0-b21, Java(TM) SE Runtime Environment, 1.7.0_04-b22
OS: Windows 7

User Comments:
GUEST: I tried to test a simple web service. I get this error for simple actions such as opening a new project or right-clicking on a project. I have re-installed everything twice - from the IDE to the servers.

GUEST: no puedo invocar un servicio web  con el cliente de netbeans

GUEST: open the secure calculator client app from samples

GUEST: occur when i press test web service

GUEST: Menu de contexto de um webservice

GUEST: Trying to test a web service I've written before.

GUEST: fuck

GUEST: Hi, this Error occurs when i try to Test REST web resource




Stacktrace: 
java.lang.NoClassDefFoundError: org/openide/util/actions/ActionInvoker$2
   at org.openide.util.actions.ActionInvoker.doPerformAction(ActionInvoker.java:108)
   at org.openide.util.actions.ActionInvoker.invokeAction(ActionInvoker.java:99)
   at org.openide.util.actions.NodeAction$DelegateAction.actionPerformed(NodeAction.java:583)
   at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
   at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
   at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)