java.lang.IllegalArgumentException:

[ramprakashjava]

hi ,
while am opening my netbeans IDE it shows this

java.lang.Illeg alArgumentExcep tion: Project module is not open and cannot be set as main.
at org.netbeans.mo dules.project.u i.OpenProjectLi st.setMainProje ct(OpenProjectL ist.java:415)
at org.netbeans.mo dules.project.u i.actions.OpenP roject.actionPe rformed(OpenPro ject.java:118)
at javax.swing.Abs tractButton.fir eActionPerforme d(AbstractButto n.java:1995)
at javax.swing.Abs tractButton$Han dler.actionPerf ormed(AbstractB utton.java:2318 )
at javax.swing.Def aultButtonModel .fireActionPerf ormed(DefaultBu ttonModel.java: 387)
at javax.swing.Def aultButtonModel .setPressed(Def aultButtonModel .java:242)
at javax.swing.Abs tractButton.doC lick(AbstractBu tton.java:357)
at javax.swing.pla f.basic.BasicMe nuItemUI.doClic k(BasicMenuItem UI.java:1216)
at javax.swing.pla f.basic.BasicMe nuItemUI$Handle r.mouseReleased (BasicMenuItemU I.java:1257)
at java.awt.Compon ent.processMous eEvent(Componen t.java:6038)
at javax.swing.JCo mponent.process MouseEvent(JCom ponent.java:326 0)
at java.awt.Compon ent.processEven t(Component.jav a:5803)
at java.awt.Contai ner.processEven t(Container.jav a:2058)
at java.awt.Compon ent.dispatchEve ntImpl(Componen t.java:4410)
at java.awt.Contai ner.dispatchEve ntImpl(Containe r.java:2116)
at java.awt.Compon ent.dispatchEve nt(Component.ja va:4240)
at java.awt.Lightw eightDispatcher .retargetMouseE vent(Container. java:4322)
at java.awt.Lightw eightDispatcher .processMouseEv ent(Container.j ava:3986)
at java.awt.Lightw eightDispatcher .dispatchEvent( Container.java: 3916)
at java.awt.Contai ner.dispatchEve ntImpl(Containe r.java:2102)
at java.awt.Window .dispatchEventI mpl(Window.java :2429)
at java.awt.Compon ent.dispatchEve nt(Component.ja va:4240)
[catch] at java.awt.EventQ ueue.dispatchEv ent(EventQueue. java:599)
at java.awt.EventD ispatchThread.p umpOneEventForF ilters(EventDis patchThread.jav a:273)
at java.awt.EventD ispatchThread.p umpEventsForFil ter(EventDispat chThread.java:1 83)
at java.awt.EventD ispatchThread.p umpEventsForHie rarchy(EventDis patchThread.jav a:173)
at java.awt.EventD ispatchThread.p umpEvents(Event DispatchThread. java:168)
at java.awt.EventD ispatchThread.p umpEvents(Event DispatchThread. java:160)
at java.awt.EventD ispatchThread.r un(EventDispatc hThread.java:12 1)
kindly reply me soon

Thanks & Regards
Ram

[jkmyoung]

What happens then? Does Netbeans open?
Have you made any recent changes to the environment? eg, moving project files, any unexpected restarts?
Is it possible for you to uninstall, and then reinstall?