>I did not know this was a know problem.

Actually, it's not a "known problem" -- it's exactly what's supposed to happen. REPLACE can operate on multiple tables. If the table in the current work area is at EOF(), you'd be left with a half-completed update. This would be a Bad Thing, so REPLACE doesn't do anything.

USE tableA IN 0
USE tableB IN 0

SELECT tableB
GO BOTTOM
SKIP
REPLACE tableB.field1 WITH "fred",
   tableA.field1 WITH "wilma"

Strangely enough, it doesn't seem to check in the other direction....

SELECT tableA
GO BOTTOM
SKIP

SELECT tableB
REPLACE tableB.field1 WITH "fred",
   tableA.field1 WITH "wilma"