reo3340
Hi there, the error says “meshes do not have the same topology”
Your source and target mesh need to match topologically but differ spatially.
Both meshes also need to be closed (No border edges)
We often use a program called “Wrap3” to do the projection of one mesh on to another. But you could do it with other tools too.
Remember to try and get the landmarks as close close as possible for best results. So for example if vertex 9874 is the elbow on the source mesh, that vertex should also be the elbow on the target.