SMP Head HPH or UBE

[diba]

Hello, I'm trying to "convert" a head from a UBE follower, but I can't find the correct UBE sliderset. When I use the transfer select weight from the [Predator] High Poly Head (SMP).osp, I get the error "the vertex count of the reference and chosen shape is not the same".
I managed to convert HPH followers without problems and they work perfectly, but I couldn't convert UBEs. What am I doing wrong? Is there a specific sliderset required for it to work?