Hi,

I'm having the same issue. I ran SPHARM-PDM in slicer 4.4.0 using my original nifti files and, while the program did run to completion, the vtk meshes could not be visualized in slicer and the program did not run properly. I tried re-running the software on a subset of images that I converted to gipl files manually using ITK snap and the problem was resolved. Any idea what went wrong with the nifti files? 

Thanks,
Jackie