I have been trying to import a xml file made with export xml workspace document from a 9.3 enterprise geodatabase, SQL server, to a 10.3.1 enterprise geodatabase, SQL server. Trying the whole geodatabase, importing to a new empty geodatabase, I got "999999 : Error executing function" and "The application is not licensed to create or modify schema for this type of data." and "The operation was attempted on an empty geometry" and "Failed to execute (ImportXMLWorkspaceDocument)." I then tried a smaller piece of the old geodatabase, just a single feature dataset. Tried importing to a different non empty geodatabase. Tried remaking the xml file from the old geodatabase. Always get the same error messages.