将igs文件导入LT出现以下问题: lA.;ZD!
16[-3cJ T
*** Error (AITX_BLANKED_ENTS) *** )p!*c,
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The input file did not contain any supported non blanked independant entities. D-o7yc"K
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Please check the documentation for a list of supported entities. iO9nvM<
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请教各位是什么原因,如何解决?