計(jì)算之后出現(xiàn)這個(gè)錯(cuò)誤，

 A large negative pivot value ( -6.567781837E-08 ) has been encountered  

 in the global assembled matrix at the UY degree of freedom of node      

 8325.  This may be caused by a bad temperature-dependent material       

 property used in the model.

應(yīng)該怎么解決