求助，谁来帮我看下ANSYS的ERROR

轻舞飞杨yyl

*** WARNING ***                         CP =      18.424   TIME= 08:42:49
Shape testing revealed that 2425 of the 7059 new or modified elements   
violate shape warning limits.  To review test results, please see the   
output file or issue the CHECK command.                                 

*** WARNING ***                         CP =      27.378   TIME= 08:48:40
Previous testing revealed that 2425 of the 7059 selected elements      
violate shape warning limits.  To review warning messages, please see   
the output or error file, or issue the CHECK command.                  

*** ERROR ***                           CP =      33.135   TIME= 08:48:57
A small negative equation solver pivot term has been encountered at the
UX degree of freedom of node 7666.  Check for an insufficiently         
constrained model.