Problem with run.py

[anzosasuke]

 File "./../../../../../UbSym/run.py", line 51, in <module>
    an.overflowAnalyze(args.prototype,args_index=args_index,arg_sizes=args_sizes,buff_type=checkType)
  File "/home/a967a038/Downloads/RESEARCH/Lab_ubuntu/gith/RES_NEW/UbSym/analysis/VulAnalyzer.py", line 385, in overflowAnalyze
    mc=MCSimulation('NFACTOR_MC.cfg',nfactor=True)
  File "/home/a967a038/Downloads/RESEARCH/Lab_ubuntu/gith/RES_NEW/UbSym/analysis/MCSimulation.py", line 24, in __init__
    with open(config_file,'r+') as handler:
FileNotFoundError: [Errno 2] No such file or directory: 'NFACTOR_MC.cfg'

How do i fix this?