将igs文件导入LT出现以下问题: &jV9*
%s$rP
*** Error (AITX_BLANKED_ENTS) *** JkSdLj
JcTp(fnW.~
The input file did not contain any supported non blanked independant entities. |'V DI]p&
SwdC,
Please check the documentation for a list of supported entities. E /fw?7eQ
_ yfdj[Ot`
请教各位是什么原因,如何解决?