将igs文件导入LT出现以下问题: ol}}c6
,m M7g
*** Error (AITX_BLANKED_ENTS) *** ,r;E[k@
@{ L|&Mk!
The input file did not contain any supported non blanked independant entities. |][PbN
D
0O(V y y
Please check the documentation for a list of supported entities. BwVq:)P/R
(/7cXd@\6
请教各位是什么原因,如何解决?