Either Blender doesn't play well with others, or there is a bug in CC, but even after exporting the full nude character (full body), bringing it into Blender and then exporting again as OBJ without even editing anything, it won't load as a morph.

I'm going to put a trouble ticket in and while I understand RL can't support ALL third party stuff they ought to at least support Blender.

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Alienware Aurora R16, Win 11, i9-149000KF, 3.20GHz CPU, 64GB RAM, RTX 4090 (24GB), Samsung 870 Pro 8TB, Gen3 MVNe M-2 SSD, 4TBx2, 39" Alienware Widescreen Monitor
Mike "ex-genius" Kelley

I don't know if it can help but I've the same problem but for the expression blendshape process with Blender. Urbanlamb make a very handfull tutorial how to use Blender for moving
polygons. The trick is to check "Keep vertex order" in the IMPORT  BLENDER process.

Yeah, that didn't work for me, but for one brief moment I was VERY excited.

Sigh.

Edit: Wait -- hmmm, I also checkmarked it in the EXPORT OBJ process and that *seems* to work (I say seems because now I get a different error message, but that's all right -- the message is the morph target and file are the same, which they are since I was just testing stuff out).

Thanks.

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Alienware Aurora R16, Win 11, i9-149000KF, 3.20GHz CPU, 64GB RAM, RTX 4090 (24GB), Samsung 870 Pro 8TB, Gen3 MVNe M-2 SSD, 4TBx2, 39" Alienware Widescreen Monitor
Mike "ex-genius" Kelley

Success!!  That was it.

Thanks so much -- it was definitely checking "keep vertex order" in Export.  I also had it on in the import process, and I'm guessing that is also important (but I'll just keep it that way).

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Alienware Aurora R16, Win 11, i9-149000KF, 3.20GHz CPU, 64GB RAM, RTX 4090 (24GB), Samsung 870 Pro 8TB, Gen3 MVNe M-2 SSD, 4TBx2, 39" Alienware Widescreen Monitor
Mike "ex-genius" Kelley

Cool. That's exactly what I said to urbanlamb , enabling "keep vertex order" before importing in Blender.
So I had the same problem with 3Dcoat and you must enable "use source positions" on the export process.