I made a pair of medieval breeches for James by modifying the P6 swimming costume in a 3D modelling program. 
They imported back into Poser and looked very nice, but when I saved them as a prop, intending to try conforming, they wouldn't reload. Or rather they reloaded without being visible, the circle's there and changes size when the scale parameter is changed.

Each time I re-import them they are visible, so I tried to re-export to UVMapper, which refused with the error  'This Obj has no facet information'

It's strange that it can be seen the first time but  not a second time. Anyone come across this before?