How about,

SELECT TABLE1
xCOUNT=0

SCAN FOR OWE <> 0
     STORE idSTD  TO xidSTD
     SELECT TABLE2
     LOCATE FOR idSTD=TABLE1.idSTD
     REPLACE OWE WITH TABLE1.OWE
     xCOUNT=xCOUNT+1
ENDSCAN

Walter,

>Problem is it keeps going into an endless loop, without exiting when the last match is found. What am I missing?
>
>TIA
>Ulises