将igs文件导入LT出现以下问题: hnnVp_<]
D & Bdl5g
*** Error (AITX_BLANKED_ENTS) *** x+bC\,q
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The input file did not contain any supported non blanked independant entities. S}3?
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Please check the documentation for a list of supported entities. !BjJ5m
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请教各位是什么原因,如何解决?