CREATE CURSOR Cursor1 ( Field1 c(10) )
INSERT INTO Cursor1 VALUES ('HLADU' )
INSERT INTO Cursor1 VALUES ('POOD')

CREATE CURSOR RCursor ( Field1 c(10) )
INSERT INTO RCursor VALUES ( 'HLADU' )
INDEX ON Field1 TAG T

SELECT Cursor1
SET RELA TO Field1 INTO RCursor

UPDATE Cursor1 ;
    SET Field1=Field1 ;
    WHERE !EOF('RCursor') AND ;
       Field1 IN (SELECT Field1 FROM RCursor )
* Result: 0
* Expected result: 1
messagebox( STR(_TALLY) )