OK, this looks like the same symptom as was recently reported here, so it’s probably not manual moving of the script files…
@dchristiaens: Is the homebrew installation grabbing the script files and placing them in /usr/local/bin/? This won’t work for 5ttgen and dwi2response, we’ll need to figure out a more appropriate way of installing / arranging / detecting these.
@kamal: A quick fix would be to grab the scripts/src/ directory, and place a copy in your /usr/local/bin/ directory (so the path that the error is complaining about - /usr/local/bin/src/_5ttgen - exists). That should allow 5ttgen to find the files it’s expecting to see based on a relative path from its own location.
Cheers
Rob