I'm trying to use LSMW to remove contents of telephone and fax fields in Vendor Master, using batch recording. I've tried it two ways; loading "blank" phone/fax values from text file, and just setting a constant rule (of null) for the telephone/fax field in the mapping step and leaving it out of the upload file. The import and convert steps look fine and display the fields as blank but the field contents are not cleared after batch is run. On the other hand, I can use these same objects to load new phone number values to these fields with no problem. How do I set up LSMW processing steps to clear fields in vendor master?