这个abaqus错误信息提示，可视化中没有结果，element set ErrElemMissingSection需要怎么操作才能打开啊？

 ***ERROR: 4 elements have missing property definitions. The elements have been 

           identified in element set ErrElemMissingSection.

 ***NOTE: DUE TO AN INPUT ERROR THE ANALYSIS PRE-PROCESSOR HAS BEEN UNABLE TO 

          INTERPRET SOME DATA.  SUBSEQUENT ERRORS MAY BE CAUSED BY THIS OMISSION

 ***WARNING: 4 elements have incorrect property definitions. The elements have 

             been identified in element set WarnElemIncorrectProperty.

 ***ERROR: SECTION DEFINITIONS ARE MISSING OR INCORRECT FOR THE ELEMENTS 

           INDICATED ABOVE. FURTHER PROCESSING OF THE INPUT FILE IS NOT 

           POSSIBLE UNTIL THIS INPUT ERROR IS FIXED.