Unhandled event loop exception error in NWDS

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Hi Experts ,

I am getting below error when I test my XSLT mapping in NWDS.

I was able to test it before and suddenly the below error started popping up.

Please provide your guidance , how to resolve this error.

Message : Unhandled event loop exception

Exception Stack Trace :

java.lang.NullPointerException

at org.eclipse.wst.xsl.launching.config.LaunchTransform.getLocation(LaunchTransform.java:98)

at org.eclipse.wst.xsl.internal.debug.ui.XSLLaunchShortcut.findOrCreateLaunchConfiguration(XSLLaunchShortcut.java:253)

at org.eclipse.wst.xsl.internal.debug.ui.XSLLaunchShortcut.launch(XSLLaunchShortcut.java:204)

at org.eclipse.wst.xsl.internal.debug.ui.XSLLaunchShortcut.searchAndLaunch(XSLLaunchShortcut.java:122)

at org.eclipse.wst.xsl.internal.debug.ui.XSLLaunchShortcut.launch(XSLLaunchShortcut.java:110)

at org.eclipse.debug.internal.ui.launchConfigurations.LaunchShortcutExtension.launch(LaunchShortcutExtension.java:424)

at org.eclipse.debug.internal.ui.actions.LaunchShortcutAction.run(LaunchShortcutAction.java:70)

at org.eclipse.debug.internal.ui.actions.LaunchShortcutAction.runWithEvent(LaunchShortcutAction.java:121)

at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)

at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)

at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411)

at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)

at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)

at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3910)

at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3503)

at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2405)

at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2369)

at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221)

at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500)

at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)

at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:493)

at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)

at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)

at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:194)

at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)

at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)

at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:368)

at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:597)

at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:559)

at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)

at org.eclipse.equinox.launcher.Main.run(Main.java:1311)

Session Data:

eclipse.buildId=@qualifier@

java.version=1.6.0_45

java.vendor=Sun Microsystems Inc.

BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en

Command-line arguments: -os win32 -ws win32 -arch x86

Regards,

Nick