Does the current development release fix your issue? If this does not help, can you share an example with my institutional email:

  https://sc.edu/study/colleges_schools/ar...

You can download the development version by going to the web page

 https://ci.appveyor.com/project/neurolabusc/dcm2niix

and selecting the operating system you use (linux, mac, win) and then clicking the "artifacts" button to download a pre-compiled executable.

Alternatively, you can build the development release youself on unix:

git clone --branch development https://github.com/rordenlab/dcm2niix.gi...

cd dcm2niix/console
make