将igs文件导入LT出现以下问题: Zxozhmg
#=;vg
*** Error (AITX_BLANKED_ENTS) *** *2rc Y
:8HVq*itS
The input file did not contain any supported non blanked independant entities. pMAP/..+2
sZEa8
Please check the documentation for a list of supported entities. nF<xJs
pM}~/
请教各位是什么原因,如何解决?