Hello,
Thank you, Yvonne, for reaching us from here.
@Francois : Yvonne is our "beta" tester of the Bst-Duneuro, she is from Carsten's group.
To come back to your error, it seems the the FEM mesh is not correct,
could you check the data of the structure "FEM 41605 V' by right click > view file contents
You should have a similar structure as in this image :
Let us know how it goes.
A+