abaqus仿真时，碰到如下错误，这是怎么回事？

Error in job Job-1: The elements containedin element set ErrElemExcessDistortion-Step1 have distorted excessively.Error in job Job-1: There are a total of 6excessively distorted elementsError in job Job-1: The elements containedin element set ErrElemExcessDistortion-Step1 have distorted excessively.Job Job-1: Abaqus/Explicit aborted due toerrors.Error in job Job-1: Abaqus/Explicit Analysisexited with an error - Please see the status file for possible error messages if the file exists.Job Job-1 aborted due to errors