We sometimes got problems when the project contained #.java files for
example. I believe that kind of files are some kind of backup files when
you got conflicts while merging.

So look for that kind of files in the navigator view, delete them en try
again.

Pim

vgupta@us.ibm.com wrote:
> Hi,
>
> I am getting the following error when I try to export a portal project to a war file
>
> An error occured when export finished
> com.ibm.wtp.common.wft.util.WFTWrappedException: Error exportingWar File
> com.ibm.etools.j2ee.commonarchivecore.exception.Sa veFailureException
> !Stack_trace_of_nested_exce!
> java.lang.NullPointerException
> at org.eclipse.core.internal.resources.Workspace.comp uteProjectOrder(Unknown Source)
> at org.eclipse.core.internal.resources.Workspace.comp utePrerequisiteOrder1(Unknown Source)
> at org.eclipse.core.internal.resources.Workspace.comp utePrerequisiteOrder(Unknown Source)
> at com.ibm.iwt.archive.wb.operations.WARExportOperati on.getProjectsInOrder(Unknown Source)
> at com.ibm.iwt.archive.wb.operations.WARExportOperati on.buildProjectsIfNecessary(Unknown Source)
> at com.ibm.iwt.archive.wb.operations.WARExportOperati on.export(Unknown Source)
> at com.ibm.etools.archive.j2ee.operations.J2EEExportO peration.execute(Unknown Source)
> at com.ibm.wtp.common.operation.WTPOperation.doRun(Un known Source)
> at com.ibm.wtp.common.operation.WTPOperation$1.run(Un known Source)
> at org.eclipse.core.internal.resources.Workspace.run( Unknown Source)
> at org.eclipse.core.internal.resources.Workspace.run( Unknown Source)
> at com.ibm.wtp.common.operation.WTPOperation.run(Unkn own Source)
> at com.ibm.wtp.common.ui.RunnableWithProgressWrapper. run(Unknown Source)
> at org.eclipse.jface.operation.ModalContext.runInCurr entThread(Unknown Source)
> at org.eclipse.jface.operation.ModalContext.run(Unkno wn Source)
> at org.eclipse.jface.wizard.WizardDialog.run(Unknown Source)
> at com.ibm.wtp.common.ui.wizard.WTPWizard.performFini sh(Unknown Source)
> at org.eclipse.jface.wizard.WizardDialog.finishPresse d(Unknown Source)
> at org.eclipse.jface.wizard.WizardDialog.buttonPresse d(Unknown Source)
> at org.eclipse.jface.dialogs.Dialog$2.widgetSelected( Unknown Source)
> at org.eclipse.swt.widgets.TypedListener.handleEvent( Unknown Source)
> at org.eclipse.swt.widgets.EventTable.sendEvent(Unkno wn Source)
> at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
> at org.eclipse.swt.widgets.Display.runDeferredEvents( Unknown Source)
> at org.eclipse.swt.widgets.Display.readAndDispatch(Un known Source)
> at org.eclipse.jface.window.Window.runEventLoop(Unkno wn Source)
> at org.eclipse.jface.window.Window.open(Unknown Source)
> at org.eclipse.ui.actions.ExportResourcesAction.run(U nknown Source)
> at org.eclipse.ui.actions.BaseSelectionListenerAction .runWithEvent(Unknown Source)
> at org.eclipse.jface.action.ActionContributionItem.ha ndleWidgetSelection(Unknown Source)
> at org.eclipse.jface.action.ActionContributionItem.ac cess$2(Unknown Source)
> at org.eclipse.jface.action.ActionContributionItem$7. handleEvent(Unknown Source)
> at org.eclipse.swt.widgets.EventTable.sendEvent(Unkno wn Source)
> at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
> at org.eclipse.swt.widgets.Display.runDeferredEvents( Unknown Source)
> at org.eclipse.swt.widgets.Display.readAndDispatch(Un known Source)
> at org.eclipse.ui.internal.Workbench.runEventLoop(Unk nown Source)
> at org.eclipse.ui.internal.Workbench.runUI(Unknown Source)
> at org.eclipse.ui.internal.Workbench.createAndRunWork bench(Unknown Source)
> at org.eclipse.ui.PlatformUI.createAndRunWorkbench(Un known Source)
> at org.eclipse.ui.internal.ide.IDEApplication.run(Unk nown Source)
> at org.eclipse.core.internal.runtime.PlatformActivato r$1.run(Unknown Source)
> at org.eclipse.core.runtime.adaptor.EclipseStarter.ru n(EclipseStarter.java:273)
> at org.eclipse.core.runtime.adaptor.EclipseStarter.ru n(EclipseStarter.java:129)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(Native MethodAccessorImpl.java:85)
> at sun.reflect.NativeMethodAccessorImpl.invoke(Native MethodAccessorImpl.java:58)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:60)
> at java.lang.reflect.Method.invoke(Method.java:391)
> at org.eclipse.core.launcher.Main.basicRun(Main.java: 185)
> at org.eclipse.core.launcher.Main.run(Main.java:704)
> at org.eclipse.core.launcher.Main.main(Main.java:688)
>
> Is this a known bug or am I doing something wrong?
> Thanks in advance!
> Vandy