You did say 'at any cost', so I was able in the past to update SWWWIHEAD-WI_STAT to READY for a 'W' Dialogue item, the 'F' Wf level was still in STARTED process in my instance. Not sure what would happen if it was not.
Or, maybe you should try to restart the Wf (probably a more recommended solution). Maybe SWUE to fire the Wf Event again to trigger the Wf?
A