将igs文件导入LT出现以下问题: ;LSANr&
;dZZ;#k%
*** Error (AITX_BLANKED_ENTS) *** tm RXgTS
ARwD~Tr
The input file did not contain any supported non blanked independant entities. a>I+]`g
ryUQU^v
Please check the documentation for a list of supported entities. a:IC)]j$_
f=gW]x7'R+
请教各位是什么原因,如何解决?