Yes - BLOCKING' is added to the ArtUpload (INP/14542).
It will accept combinations of Z,P,R,S (Production blocked (Z), Purchase blocked (P), Relink blocked (R), Sales blocked (S)) in a commalist-format (for example P,S ).
Note that this will update BLOCKING with the value that is sent in (not add them to what may already be there), so if for example a part already has purchase blocked (P) set and this should be kept when adding sales blocked (S), one will have to add P,S (not just the additional ‘S’). It is possible to send in '(BLANK)' as a value (without the ' ) for the option of removing all values from the field.