[Tutorial] How to make models in Call of Duty 2

[Loveboy]

I said in this tutorial:

You see, its orange (selected all) , now we want only select the chair. Do a right click on the chair to have it as yellow.

If you Export it while all is selected, then you will get this error ^^
Do a right-click on the chair , then if the Background is yellow, then try to Export it again.