Exporting problem

[Zugbug]

I was trying out Gmax. I created a mushroom model, mapped it with some normal colours, exported it. (dex script). Everything was fine except the mapping. Oh well, I went back changed it, and when I tried to export it it either:
a) Finished in half a second and showed just a pair of lines;
b) Lagged and crashed.
I tried with other Dex script (one by BlinkBoy) and I got this:

It is a bit too large

Help Please?