business intern

Hi I am new to this software and I received this message after running optistruct analysis and I dont understand what I did wrong? 

I  Create a PSHELL property for shell elements and assign to respective components/elements.  

Thanks

*** ERROR # 1000 *** in the input data:
 Incorrect data in field # 4.

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

 A fatal error has been detected during input processing:

  *** See next message about line 3043 from file:
      C:/Users/soumayaelaggouni/Desktop/test1.fem
   'PSHEAR         1       1'

  *** ERROR # 1000 *** in the input data:
  Incorrect data in field # 4.

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

 ==== End of solver screen output ==== 

 ==== OptiStruct Job completed ====