DWI Convert: .Nifti to .nrrd gives extremely small file size, unable to run in UKF Tractography

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1

Operating system: iMac
Slicer version: 4.10.2
Expected behavior: DWI Nifti file with 54 different diffusion-sensitizing gradient directions would convert to .nrrd and generate a file size similar to the sample data online (42 directions, 85MB) and run smoothly in UKF Tractography like the sample dataset.
Actual behavior: DWI Nifti file with 54 different diffusion-sensitizing gradient directions generates a .nrrd file of 4.5MB and gives error when run in UKF Tractography (error: libc++abi.dylib: terminating). Strangely, my converted .nifti to .nrrd file of 4.5MB runs smoothly in other tractography modules, but not the UKF module.

Is it normal to have such a small .nrrd file size or could it be losing info during convert to .nrrd?

2

If you have DICOM please use the dcm2nii module instead to get nrrd.

What other error text appeared before that last error?