I have a document that I can't delete in a plain document library. Not Declared, Not a Permission problem. I have about 305 documents in the library and only one of them I can't check out, edit, open, or delete. I have used SP Manager and can't delete that way either (error - Unhandled exception has occurred in your application.) On the Metadata that seems to be corrupted is says FirstUniqueAncestor - Cannot complete this action. Please try again. When I try to edit them I get an Error - Property accessor 'FirstUniqueAncestor' on object 'Microsoft.SharePoint.SPListItem' threw the following excemption: 'Cannot complete this action. Any suggestion on how to delete the file would help, Powershell, STSADM anything.