Obj unable to find material ' '

[Jeff]

The file loads and the geometry is there. The problem is that the scale is off and you don't see it. Try running the following:

import viz
viz.go()

viz.add('temp_1.obj',pos=[0,2,2],euler=[0,-90,0],scale=[0.01,0.01,0.01])

The error message indicates there are no associated material files found.