Thanks for the reply.
I originally had this issue runnnng it from the command line, but it happens in the GUI as well.
Without the lossy conversion option, it initially generates an error, “Error: ReadVolume: Unsupported source pixel type”
When I run it with the lossy conversion option, it changes the error to ‘Segmentation fault: 11’
I’ve tried it with the stable build (4.10), the nightly build (4.11) and older versions (4.8).
One issue that could possibly contribute to this is that I’ve started with a 4D DWI file in .nii format, that includes 2 separate acquisitions. I extract those into two separate files, split out the b-vectors and b-values, and then convert the resultant .nii files into .nrrd files before running DTIPrep on each .nrrd files. Then, when I try to convert back to .nii, I get these errors.
Any ideas? What other information would be helpful for you?