Hello TARGOR
What version of .GR2 editor have you use for export
![06](images/smilies/06.gif)
Other maybe,that come from your version of 3DsMax
![Hmmm](images/smilies/39.gif)
Me , i have the 2010 and that work without problems and SilentMichal use the 2013 and ditto no problems ...
Edit:
For import in .GR2 editor,use the "Loose" option
and when you export set the output precison number in 3dSMax to : 9
other thing the numbers of faces/vertices must be the same in the both objects
and the name must be : OBJECTNAME.OBJ and OBJECTNAME_AO.OBJ
I hope that will help you