to anyone that know CST EDA tool on bending technique...

i'm stuck in the bending of flex. previously when i import my flex file, i cannot bend certain layer till to the error "simplify or heal the geometry". but, now i solved it by untick the geometry line when i import my ODB++ file, and another problem that should not be problem occur. attached is the problem i face. when i want to change from 3D to 2D by using pick face, certain area is not pick finish. any solution? thanks.