ABAQUS计算时报错？

NOT ALL ELEMENTS OF THE SURFACE ASSEMBLY_M_SURF-4 ARE RIGID. THIS SURFACE CAN NOT BE USED WITH *CONTACT PAIR, UNLESS ALL OF ITS ELEMENTS ARE RIGID OR ALL OF ITS ELEMENTS ARE DEFORMABLE.

这是报错内容，其中m-surf-4是刀具表面集，已经定义了rigid body，这是哪里出错了呢？

谢谢