I run this simulation again and that error is gone. But there is still some errors shown as below.

 *** WARNING ***                         CP =       1.578   TIME= 21:10:02
 Element shape checking is currently inactive.  Issue SHPP,ON or        
 SHPP,WARN to reactivate, if desired.                                   

 *** NOTE ***                            CP =       1.703   TIME= 21:10:02
 The model data was checked and warning messages were found.            
  Please review output or errors file (                                 
 ectScratchScrED20file0.err ) for these warning messages.    


But when I try to find this error file, the folder " ProjectScratch" can not be found in my computer.


Looking forwards to your reply.