Hello!
Its me again. I need a little advice. I faced with the same problem: model has successfully loaded but not visible on the scene.
Model parameters are:
Origin : (0.0,0.0,0.0)
Center (Transformed center) : (-0.38567856,-2007.5032,-570.4014)
Bounding box : [-1455.0249, 1380.9241, -2979.1418, 174.60309, -944.2183, 26.167683]
Camera position is (0.0,-1402.2693,-5674.8354) and it looks at model's transformed center.
I supposed that model should be in camera's scope.
May the problem be not in model location? Some wrong materials or something else?
(I've attached the model file if you need to try to load it.)