I'm strangely getting the same error other people reported here, even though I'm on the 2.4.1 update.
http://puu.sh/gQr1u/77ab8ea241.png

export settings:
http://puu.sh/gQr3v/3ed18557fd.png

my model is just the simple starter cube, resized to be a id-card-like model, else theres only the standard camera and that one light inside the scene, I'm trying to export the cube as smd only though.