Hypermesh+Abaqus接触问题？

Surface assembly__pickedsurf15 has facets that are not oriented properly with respect to each other. Check the element connectivities for underlying elements 4041 instance part-1-1 and 1548398 instance part-1-1 (sharing the common edge whose end points are nodes 141 instance part-1-1 and 142 instance part-1-1), as well as the *surface data cards to ensure that the surface normals are consistent. This message will not be repeated for other facets on this surface with similar problem.

Surface assembly__pickedsurf15 has facets that are not oriented properly with respect to neigh boring facets. Use available post processor to visualize surface normals.

Analysis Input File Processor exited with an error - Please see the  Job-2.dat file for possible error messages if the file exists..

这是为什么呢