What, exactly, are the steps?
I managed to get the BVH of Victoria4 from Poser into Motion Builder okay, and I think I got the control rig mapped correctly. I'm a little confused whether to use the abdomen as the main spine, or the chest, but I think I got it correctly cuz the animation seems to work okay... But now I can't seem to export it. I'm either getting an error that I need to select a charcter to export, or an error that the character needs to form a heirarchy. Am I not selecting the character correctly? Did I choose the wrong base for the spine?
Please help! Thank you.

the hip is the base element in poser. bvh does not include the body element AFAIK.

Yeah, I know the hip is the base element, but in Motion Builder, when you're defining a character, at least 1 spine bone is required. You can have up to 10, I think. Victoria4 has 2: the abdomen, and the chest. So I had to guess as to which one to make the `main' spine bone. I picked the abdomen, but now I'm wondering if I didn't choose the wrong one cuz of the whole "heirarchy" thing...

And I'm not sure what you mean about BVH not including the body element. I'm wondering how, exactly, I'm supposed to select the charcter before clicking "File", "Export", "BVH", cuz, apparently, either the way I'm doing it isn't correct, or I've somehow screwed-up the "heirarchy" I guess.