Quote - It's a one time deal, no need to reload for each character.  If it was loading fine in P8, it should load fine in P9.  The only recommendation coming to mind is rebooting P9 and trying again.

BTW, did you link the P8 runtime to P9 or did you reload the character file into P9?

Both.  I have must of my V4 stuff in a Poser 7 runtime that I also used in Poser 8.  I have my M4 stuff in the Poser 8 runtime.  However I have the V4 and M4 figures in all three runtimes so I can get to them quickly. I have both runtimes linked to Poser 9.