[CrazyNash]

I hadn't that problem but a few ideas (assuming you're running under linux and not windows), as this error indicates that the auto-generated shell script (which is running the rtmpdump) can't be executed on your system :
- is your bash installation correct ? is bash available in your PATH before running this python script ?
- is your UMASK correct ? try setting a umask of 0 to have generated files have permissions 777 (just for the try)
- alternatively, you may probably edit the run.py script and modify the subprocess.Popen line to have something like "subprocess.Popen('/bin/bash '+script,cwd='Scripts/')