annotated counts not registering to csv

[aaubry89]

I am having the problem that is similar to #13. However, I am using the .nrrd file as my annotation file. When I come to this bit of code :
vox = voxelize(points, AtlasFile, **voxelizeParameter); if not isinstance(vox, basestring): io.writeData(os.path.join(BaseDirectory, 'cells_heatmap.tif'), vox.astype('int32'));

I get "0/n processed" without any error or counting up to n. This happens even though cell counts look good when I run the test. Has any one else run into this issue?