As workaround just export chunks of the model, rather all of it at once.

I'm sure in time 64 bit MoI will come.

Actually I was able to generate an OBJ file with an even finer mesh than the default by saving memory and running MoI in batch mode, i.e. executing it from a Command Prompt window with the following script as an argument:

var FileName = 'biggie.3dm';
var gd = moi.geometryDatabase;
moi.settings.igesJoinOnImport = false;
gd.open( FileName, true );
OBJFileName = FileName.substr( 0, FileName.lastIndexOf('.') +1 ) + 'obj';
gd.saveAs( OBJFileName, 'NoUI=true;Output=quads;Angle=10' );
gd.fileNew( true );
moi.exit( true );


Al