将igs文件导入LT出现以下问题: x\taG.'zX
{A2EGUmF2
*** Error (AITX_BLANKED_ENTS) *** }uWIF|h~
zbQ-l1E
The input file did not contain any supported non blanked independant entities. -*xm<R],
7|4t;F!
Please check the documentation for a list of supported entities. E"d\N-I
~aKM+KmtPH
请教各位是什么原因,如何解决?