SharePoint 2010 STSADM Import Fails

Hi,

I do use export and import operations in stsadm. I get this error message when I try import. I haven't figure it out what might cause this issue. If anybody has same issue, we can discuss here. Thanks.

[2/3/2011 10:50:11 AM] Verbose: Performing final fixups.

[2/3/2011 10:50:11 AM] FatalError: Cannot complete this action.

Please try again.

[2/3/2011 10:50:11 AM] Debug:    at Microsoft.SharePoint.SPGlobal.HandleComException(COMException comEx)

   at Microsoft.SharePoint.Library.SPRequest.ImportNavigationXml(String bstrUrlWeb, String bstrNavXml, Boolean fClearNavigation)

   at Microsoft.SharePoint.Deployment.ImportObjectManager.ImportWebStructure()

   at Microsoft.SharePoint.Deployment.SPImport.DeserializeObjects()

   at Microsoft.SharePoint.Deployment.SPImport.Run()

[2/3/2011 10:50:11 AM] Progress: Import did not complete.