Ok, first time I didn't triangluate all mesh and got an error msg saying the same thing I posted earlier..."mesh tried to use 'phong1' material which has not be defined". Now, second time I triangulated all mesh and error msg appears again.

It seems that the exporter does not recognize about phongs? Anything else to be fixed?

I will try with a blinn material to see if it works or not.

Btw, are you serious it takes a day to export? That's a killer. I tried to export a big file and left it overnight and was still exporting this morning. Does it matters what spec your comp has to increase the process faster?