**Incognitas.. I had the same import problems a while ago... then I discovered that EVERY MATERIAL imported in Bryce that carries within the  :   symbol as namefile is ruining the saved scene somehow, til the point that when you got to reopen the saved file, its impossibile.

SO try this, once imported the Poser file, check EVERY surface/material REMOVING every
" :  " symbol that you find.

You got to remove all of them....
**