Hi Nils
StatNonParamTestPDM is an older version of our statistical analysis that is currently no longer supported (I did recompile it just a while ago, which is the version you are using, as requested by one of the SPHARM users, but in general we advocate the use of its replacement, shapeAnalysisMANCOVA).

If you want to use StatNonParamTestPDM then you have to first convert the surfaces to an older surface format use by pre v1.0 versions. At that point, SPHARM employed the ITK-based meta surface format, currently we are supporting the more widely employed vtk format.

So, you need to first convert your vtk surface to meta surfaces and then you feed those meta surfaces to StatNonParamtestPDM. This can be done with the VTK2Meta tool that is distributed with SPHARM.

Hope this helps
Martin