将igs文件导入LT出现以下问题: i4
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< YuI}d~'
*** Error (AITX_BLANKED_ENTS) *** !Jo.Un7
QLTE`t5w3'
The input file did not contain any supported non blanked independant entities. W&^2Fb
yDw^xGws
Please check the documentation for a list of supported entities. L G9#D
II_MY#0X
请教各位是什么原因,如何解决?