Quote - Can V4.1 be causing my grief?  I can bring in PZ'3 that used V3, but I cannot import or open v4.1 pz3's withtout Poser crashing?

Anyone else having a similar problem??

Did you save the problem PZ3 with "Use external binary morphs" turned on ?

If you did, you'll have a PMD file with the same name as the PZ3.
The only (partial) cure for P6 is to rename the PMD file and then load the scene.
You'll lose any morphs from the scene, but you'll get everything else back.

An upgrade to P7 may allow you to recover the whole scene.

Be sure to turn "Use external binary morphs" off before resaving any recovered scene or saving a new scene with V4 or V4.1 in.