使用hyperworks做完前处理后生成bdf文件，在导入patran时报错如下，求问如何解决？

Problem detected while importing the MSC.Nastran input file using SOL nifimp_v22

Do you wish to continue?

Selecting "Yes" will continue and attempt to import the file. Check the .log file for the problem detected.

Selecting "No" will halt the import, but will retain diagnostic files in the working directory. Check the resulting .f06/.err/.log file for the problem detected.

选择YES后：Fatal errors encountered trying to read input file. The import process was aborted.

打开生成的log文件，提示如下错误：

 *** BEGIN MESSAGE ECHO (NIFIMP) 

 *** USER FATAL MESSAGE 307 (NIFIMP) at LINE 51764 

     ILLEGAL NAME FOR BULK DATA EN T RY

 *** USER FATAL MESSAGE 307 (NIFIMP) at LINE 51766 

     ILLEGAL NAME FOR BULK DATA EN T RY

 *** USER FATAL MESSAGE 307 (NIFIMP) at LINE 51788 

     ILLEGAL NAME FOR BULK DATA EN T RY

 *** END MESSAGE ECHO (NIFIMP) 

用notepad打开检查bdf文件对应行，显示均为空白

请问可能是什么问题？如何解决