将igs文件导入LT出现以下问题: w0`aW6t#
Id_?
*** Error (AITX_BLANKED_ENTS) *** R1CoS6
(7v]bqfw
The input file did not contain any supported non blanked independant entities. 8v eG^o
Y`secUg
Please check the documentation for a list of supported entities. Z %?:
CA
d46PAA{'
请教各位是什么原因,如何解决?