将igs文件导入LT出现以下问题: `\UY5n72
kOydh(yE
*** Error (AITX_BLANKED_ENTS) *** ,jY:@<n
:r*hY$v
The input file did not contain any supported non blanked independant entities. JN
wI{
2VN].t:
Please check the documentation for a list of supported entities. -EiTP:A
]rv\sD`[
请教各位是什么原因,如何解决?