maxwell16.0导入solidworks2012的装配体文件出现错误

tyyz001

系统win7x64bit；
maxwell-16.0x64bit;
solidworks2012-64bit;

同一图纸在solidworks零件另存为igs文件导入maxwell能够正常仿真，

在solidworks装配体中另存为igs文件导入maxwell提示
    [error] Process '3dnms' terminated abnormally.  It may have run out of memory or could have been killed by the user. (5:48:09 下午  七月 19, 2016)

求高手支招解决问题
   

同一零件图纸，直接另存为igs-导入-ok；
新建装配体-插入零件-另存igs-导入-提示run out of memory or could have been killed by the user；