make_sdimage - Scrpt not working correctly

Did it hang a long time before finally showing an error? When I ran the script it was hanging. I didn't have the patience to wait to see if it finally produced an error. For me, it was a problem with Python interacting with the fdisk command. The system wasn't outputting the output of fdisk in time for the script to interact with it. I think because my virus/security software was doing something with that data buffer in the background. Anyway - what solved it for me was I added stdbuf -i0 -o0 -e0 to the command at the beginning (after sudo and before ./make_sdimage.py .