You could shorten things a little too.

m.llDidAll=.F.
begin transaction
if tableupdate(.t.,.t.,'Stock') ;
    and tableupdate(.t.,.t.,'stockdetail') ;
    and tableupdate(.t.,.t.,'cust')
  m.llDidAll=.y.
endif

IF m.llDidAll
   END TRANSACTION
ELSE
   ROLLBACK
   WAIT WINDOW 'Rollback, call your dealer'
ENDIF

>
>all the tables are Optimistic table buffering (5), I have around 15 tables to update.
>
>at the beginning, I'm very confident the code will work, but after I received so many complains from difference clients, I have no more confident. none of them got the Rollback message but some of tables were not updated.
>
>am I missing something?
>
>please advise.
>
>regards,
>
>Jerry