In order to run nhm2srf.py code to generate SRFs, a "selection file" is needed. This text file can be specified in multiple ways (depending on the approach utilized for considering uncertainty in ruptures), as:
fault_name num_monteCarlo_realizations"r"
(note for approach 3: append "r" to the number of realizations (e.g., 30r) to generate randomized hypoceter with one slip distirbution per each)