Your whole model is smaller than 0.5 or 1 quants (judging from the screenshot)... Just scale it, like I said two times before, by a factor of let's say 64 and everything will be fine.
MED -> Object -> Scale Global -> Scale factor: 64
"Falls das Resultat nicht einfach nur dermassen gut aussieht, sollten Sie nochmal von vorn anfangen..." - Manual