大家帮忙看看这个错误是什么意思

  

 *** OptiStruct defaults set from:

   install config file: D:\CX\Hyper\/hwsolvers/optistruct.cfg.

  

  

 NOTE # 9199

 MSGLMT=STRICT is active, all messages will be printed.

 You can suppress some less important warning messages by use of

  MSGLMT=BRIEF or UNREF (in config file or in the input data).

  

 NOTE # 1929

 Created RAM scratch area: total size 200 MB.

  

  

 *** ERROR 14: Missing      MAT #    1 referenced by  PSHELL # 1.

 *** ERROR 14: Missing      MAT #    1 referenced by  PSHELL # 1.

 *** ERROR 14: Missing      MAT #    1 referenced by  PSHELL # 1.

 *** Errors with missing, incorrect or duplicate IDs found 3 times.

   IN ADDITION    200 MB RAMDISK AREA WAS ALLOCATED IN MEMORY

 MAXIMUM DISK SPACE USED                                     1 MB

************************************************************************

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COMPUTE TIME INFORMATION

------------------------

 EXECUTION STARTED                         Sat Jul 31 14:50:58 2021    

 EXECUTION COMPLETED                       Sat Jul 31 14:50:58 2021    

 ELAPSED TIME                                         00:00:00

 CPU TIME                                             00:00:00

************************************************************************

  

 

 *** PROGRAM STOPPED: FATAL ERROR(s) ENCOUNTERED.

 

                        ***** END OF REPORT *****

  

 For Useful OptiStruct Tips and Tricks, go to the URL:

 http://www.altairhyperworks.com/tips.aspx

  

************************************************************************

  

 There were 3 error messages during input processing.

  The first message is repeated below:

  

  *** ERROR 14: Missing      MAT #    1 referenced by  PSHELL # 1.

  

  

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