What is wrong with this SELECT statement? I am getting "SQL: GROUP BY clause missing or invalid" error message. Please help... Thanks, Sam

SELECT VENID_55, COMNAM_08, SUM(COST_55*TNXQTY_55) AS STDCOST, ;
	SUM(ORDCST_55*TNXQTY_55) AS POCOST ;
FROM VRSUMINV1 ;
GROUP BY VENID_55 ;
ORDER BY VENID_55 ;
INTO CURSOR VRSUMINV2