求助optistruct,下面报错如何解决

*** ERROR # 1000 *** in the input data:
Incorrect data in field # 3.
**************************************************************************
A fatal error has been detected during input processing:
*** Problem(s) found while reading line 341500 from file: D:/PORE/prtlungu0006.fem
"PLOAD4 2 045.0 0"
*** ERROR # 1000 *** in the input data:
Incorrect data in field # 3.
**************************************************************************
==== End of solver screen output ====
==== Job completed ====