The warning is issued by PML itself. The program re-reads the object after export again and compares it to the figure vertex data. This is a smoke test which shall assert that the object got properly welded and exported (my exporter works a little bit different than posers built-in export, to avoid the damn orphan vertices). And with new skinning it notices something isnt right. My assumption is that the WorldVertex() functions, when used on weld-slave vertices, now return the slave-coordinate, not the welded coordinate. This is different with classical skinning, I suspect. The other option is that something always has been wrong in PML, which I do not hope, and now its right with new skinning.