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xNormal Error - Vertex UV indices not the same as Position Vertex Indices

polycounter lvl 7
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Alfax polycounter lvl 7
I've been trying to use xnormal like I usually do, but this one particular 3D model is causing me a lot of trouble at the moment. Any time I try and generate maps from it and its high-poly counterpart, I get the following message:

"The mesh has vertex UV indices but the count is not the same than the position vertex indices. Please sure the mesh->UVIndices.size() is ZERO or the same than the mesh-> PositionIndices.size()"

I saw a previous thread with a similar problem while looking for a solution, but I've been unlucky in trying to put these fixes to use. As far as I've looked there are no hidden faces in the model, but then again I've never had to check for this problem before so maybe I should be using a script or tool to check rather than trust my eyes. There is also only 1 UV set/channel Maya could possibly export, so I'm not sure it's a UV set problem. The UV shells themselves look fine and my workflow hasn't deviated from how I usually do things.
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