将igs文件导入LT出现以下问题: %TP0i#J
0PjWfM8%
*** Error (AITX_BLANKED_ENTS) *** = ;4cDmZh
MZv In ZS
The input file did not contain any supported non blanked independant entities. 9m/v^
+' QX`
Please check the documentation for a list of supported entities. `,3;#.[D
$<OX\f%
请教各位是什么原因,如何解决?