Good question ::) I must have been focused on it from former ideas.

just

IF tnGroup <> pnGroup 
 pnGroup = tnGroup
 ...

and it is o.k.

Agnes
>I'm not sure why you would need a subquery
>

>CREATE CURSOR crsTest (pk i autoinc, grp i, bitfld i)
>
>FOR i=1 TO 5
>	FOR j= 1 TO 4
>		INSERT INTO crsTest (grp, bitfld) VALUES (i,j* 10^i)
>	ENDFOR
>ENDFOR
>
>pnResult = 0
>pnGroup = 0
>
>SELECT grp, MAX(BitorSql(grp, bitfld)) AS BitField ;
>	FROM crsTest ;
>	GROUP BY grp
>RETURN
>
>
>FUNCTION BitorSql(tnGroup, tnVal)
>IF tnGroup <> pnGroup 
>	pnResult = 0
>ENDIF	
>pnResult = BITOR(pnResult, tnVal)
>RETURN pnResult
>