Tet meshing with boundary layer fails

How can I create boundary layer around the attached step file. It fails meshing with tet-meshing. I used the following commands.

import step "swit7_wb.step" heal
healer autoheal vol all rebuild
compress
curve 1 to 141 interval 25 scheme equal
curve 142 to 153 interval 10 equal
mesh curve 1 to 153

Create boundary layer for surface 1 to 55 in volume 1 with 1 as initial height, bias 1.2 and layers 10.

volume 1 scheme tetmesh
mesh vol 1

The surface is failing for some surfaces and hence the volume mesh is failing. What could be the solution for the problem ?

Thanks,
Gaurav

Swift7_sb.step (781.0 KB)