Do not worry, it has been a bit frustrating for me, but I am now glad ROBEX is working fine. :)

Although unrelated, I would like to mention I did change the #define for the (hard-coded) paths to the reference volumes so that I could call the program from anywhere on my computer. Otherwise I had to copy the images to the program folder, which was a pain in the end. Thanks for making the code clear and open-source so that these changes are easy to make!