CLEAR SET NULL ON CREATE CURSOR BYBYBUG (AB M NOT NULL) X1="''" ? EVALUATE([&X1])==&X1 && are fully equal INDEX ON CAST(&X1 AS C(200)) TAG T2 && no error INDEX ON CAST(&X1 AS V(200)) TAG T2V && no error INDEX ON CAST(EVALUATE([&X1]) AS C(200)) TAG T3 && no error INDEX ON CAST(EVALUATE([&X1]) AS V(200)) TAG T3V && FIRE A ERROR, DON'T SHOULD