错误如下

Error in job Job-1: The volume of 3 elements is zero, small, or negative. Check coordinates or node numbering, or modify the mesh seed. In the case of a tetrahedron this error may indicate that all nodes are located very nearly in a plane. The elements have been identified in element set ErrElemVolSmallNegZero.

Job Job-1: Analysis Input File Processor aborted due to errors.

Error in job Job-1: Analysis Input File Processor exited with an error.

Job Job-1 aborted due to errors.

就想知道什么原因以及怎样修改