voltoffea fails with my vol file

ffeatools voltoffea fails to work with the attached vol file, generated by netgen. However, it used to work with this same file. Anybody?

14:23 kokeicha:~/projects/MesoModel/probes/8_eulerBeamTheory/wtf> ffeatools voltoffea --mesh longCylinder.vol -density 1500.0 -shear_visc 0.001 -bulk_visc 0.001 -shear_mod 285714285.7 -bulk_mod 1333333333.3 -dielec 1.0 -make_script ACTION = 'voltoffea' => Using command 'python /home/DS/issaso/projects/MesoModel/code/bitbucket/install/lib/python2.6/FFEA_initialise/FFEA_convert_from_volume/FFEA_convert_from_volumetric_mesh.py --mesh longCylinder.vol -density 1500.0 -shear_visc 0.001 -bulk_visc 0.001 -shear_mod 285714285.7 -bulk_mod 1333333333.3 -dielec 1.0 -make_script'

Loading FFEA node file...done! Loading FFEA topology file... Loading FFEA surface file... Traceback (most recent call last): File "/home/DS/issaso/projects/MesoModel/code/bitbucket/install/lib/python2.6/FFEA_initialise/FFEA_convert_from_volume/FFEA_convert_from_volumetric_mesh.py", line 105, in <module> surf = FFEA_surface.FFEA_surface(volfname) File "/home/DS/issaso/projects/MesoModel/code/bitbucket/install/lib/python2.6/FFEA_python_modules/FFEA_surface.py", line 11, in init self.load(fname) File "/home/DS/issaso/projects/MesoModel/code/bitbucket/install/lib/python2.6/FFEA_python_modules/FFEA_surface.py", line 28, in load self.load_vol(fname) File "/home/DS/issaso/projects/MesoModel/code/bitbucket/install/lib/python2.6/FFEA_python_modules/FFEA_surface.py", line 154, in load_vol raise Exception("\tCouldn't find the specified %d faces. Only found %d. File '" + fname + "' not formatted correctly." % (num_faces, i)) TypeError: not all arguments converted during string formatting

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