Poser Pro 2012.  I am saving to the library. I can save the hair separately and add it back to the character - no problem.  And I have characters in the library backed up from last night.  I can reload them and they render fine.  When I try to take the hair off of them and add them to the scene where I am working on the character - they work fine until I add them back to the library.  Once I do, I create a new poser file and add them to the scene from the library just as always.  Hair will not render.

But on the library characters I copied back in from the backup - I do not have this problem.  It's as though something in the Scene is corrupting them as they are added to the library.  Weird.

 

Windows 10 - Poser Pro 2012 - 64Bit - 24GB RAM - 4 x 3.40 GHZ processor