怎么解决abaqus材料定义的问题？

Error in job s1: Anisotropic material properties without a local orientation system have been defined for 8000 elements. Anisotropic material properties must be defined in a local orientation system. The elements are identified in element set ErrElemAnisotropicMaterial.

提交之后显示了这个，在之前设置材料属性的时候设置的各项同性，但这里为什么提出了各项异性？还有应该如何解决？

谢谢