将igs文件导入LT出现以下问题: -?-XO<I
=KUmvV*\
*** Error (AITX_BLANKED_ENTS) *** mwo:+^v(
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Mg6
The input file did not contain any supported non blanked independant entities. G0{Z@CvO'
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Please check the documentation for a list of supported entities. |)+
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请教各位是什么原因,如何解决?