WSAD Start error

[Anand Gondhiya]

My WSAD was freezing so I had to do end task. After that , when I tried to start the WSAD , it throws following error and doesn't start.
Problems during start up.Check the ".log" file in metadata of your workspace

I checked the .log file . This is what I see.
_____________________________________________

 java.fullversion=J2RE 1.3.1 IBM Windows 32 build cn131-20031021 (JIT enabled: jitc)
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en_US
Command-line arguments: -os win32 -ws win32 -arch x86 -data C:\CVS Projects\opapp -ws win32 -vmargs -Xj9 -install file:C:/Program Files/IBM/WebSphere Studio/Application Developer/v5.1.2/eclipse/
!ENTRY org.eclipse.ui.workbench 4 2 Oct 02, 2007 15:23:05.956
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.ui.workbench".
!STACK 0
java.lang.NullPointerException
at org.eclipse.debug.ui.actions.AbstractLaunchHistoryAction.updateTooltip(AbstractLaunchHistoryAction.java:155)
at org.eclipse.debug.ui.actions.AbstractLaunchHistoryAction.initialize(AbstractLaunchHistoryAction.java:126)
at org.eclipse.debug.ui.actions.AbstractLaunchHistoryAction.selectionChanged(AbstractLaunchHistoryAction.java:305)
at org.eclipse.ui.internal.PluginAction.refreshEnablement(PluginAction.java:205)
at org.eclipse.ui.internal.PluginAction.createDelegate(PluginAction.java:106)
at org.eclipse.ui.internal.WWinPluginPulldown.getPulldownDelegate(WWinPluginPulldown.java:74)
at org.eclipse.ui.internal.WWinPluginPulldown$MenuProxy.getMenu(WWinPluginPulldown.java:35)
at org.eclipse.jface.action.ActionContributionItem.fill(ActionContributionItem.java:278)
at org.eclipse.jface.action.SubContributionItem.fill(SubContributionItem.java:58)
at org.eclipse.jface.action.MenuManager.update(MenuManager.java:555)
at org.eclipse.jface.action.MenuManager.update(MenuManager.java:456)
at org.eclipse.jface.action.MenuManager.fill(MenuManager.java:209)
at org.eclipse.jface.action.SubMenuManager.fill(SubMenuManager.java:74)
at org.eclipse.jface.action.SubContributionItem.fill(SubContributionItem.java:58)
at org.eclipse.jface.action.MenuManager.update(MenuManager.java:555)
at org.eclipse.jface.action.MenuManager.updateAll(MenuManager.java:608)
at org.eclipse.ui.internal.WorkbenchWindow.updateActionBars(WorkbenchWindow.java:1717)
at org.eclipse.ui.internal.WorkbenchWindow.updateActionSets(WorkbenchWindow.java:1735)
at org.eclipse.ui.internal.WorkbenchWindow$7.run(WorkbenchWindow.java:1509)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:69)
at org.eclipse.ui.internal.WorkbenchWindow.setActivePage(WorkbenchWindow.java:1483)
at org.eclipse.ui.internal.WorkbenchWindow.restoreState(WorkbenchWindow.java:1363)
at org.eclipse.ui.internal.Workbench.restoreState(Workbench.java:1263)
at org.eclipse.ui.internal.Workbench.access$10(Workbench.java:1223)
at org.eclipse.ui.internal.Workbench$12.run(Workbench.java:1141)
at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:1006)
at org.eclipse.core.runtime.Platform.run(Platform.java:413)
at org.eclipse.ui.internal.Workbench.openPreviousWorkbenchState(Workbench.java:1093)
at org.eclipse.ui.internal.Workbench.init(Workbench.java:870)
at org.eclipse.ui.internal.Workbench.run(Workbench.java:1373)
at org.eclipse.core.internal.boot.InternalBootLoader.run(InternalBootLoader.java:858)
at org.eclipse.core.boot.BootLoader.run(BootLoader.java:461)
at java.lang.reflect.Method.invoke(Native Method)
at org.eclipse.core.launcher.Main.basicRun(Main.java:291)
at org.eclipse.core.launcher.Main.run(Main.java:747)
at org.eclipse.core.launcher.Main.main(Main.java:583)
!ENTRY org.eclipse.core.runtime 4 2 Oct 02, 2007 15:23:06.346
!MESSAGE Plug-in "org.eclipse.debug.ui" was unable to instantiate class "org.eclipse.debug.internal.ui.actions.RunAsAction".
!STACK 0
java.lang.NullPointerException
at org.eclipse.debug.ui.actions.LaunchAsAction.getMode(LaunchAsAction.java:222)
at org.eclipse.debug.ui.actions.LaunchAsAction.<init>(LaunchAsAction.java:71)
at org.eclipse.debug.internal.ui.actions.RunAsAction.<init>(RunAsAction.java:23)
at java.lang.Class.newInstance0(Native Method)
at java.lang.Class.newInstance(Class.java:262)
at org.eclipse.core.internal.plugins.PluginDescriptor.createExecutableExtension
   

Please advise.
thanks
-Anand

[Merrill Higginson]

I'd suggest you start WSAD and point it to a new empty workspace and see if that fixes it. If it does, you can then import your projects from the old workspace.

[Anand Gondhiya]

I tried this solution and it worked. Thanks !