将igs文件导入LT出现以下问题: 5w5"rcV
b^A7R{G7
*** Error (AITX_BLANKED_ENTS) *** 3gYtu-1
r,q.RWuII
The input file did not contain any supported non blanked independant entities. a:s$[+'Y
5%+epzy
Please check the documentation for a list of supported entities. !-t"}^)
f# -\*
请教各位是什么原因,如何解决?