Thanks.

The SP is simply Delete from tablename where codefield = 'C'

I've thought it was permissions all along, but I can't find any that are not set properly.

The users are all PUBLIC

Public has EXECUTE rights on the SP

Public has ALL rights on the table (Delete Insert Select Update)

Is there anything about launching it from Access-VBA I should know?

BTW: All my other SPs (non-delete) run fine launched from Access ADP.