How to use CCMpred to generate braw files?

Hello, I have a question to ask you, when I used **ccmpred example.psc example.mat -b example.braw -d 0** command to generate braw file, there was an error. Error: **unknown option b at argument index 22** So I can't generate my own braw file. I installed it on GitHub by CCMpred. How did you generate the braw file?
 Any thoughts would be greatly appreciated! Thanks.