KeyError: 'master'

[prosperwashaya]

Traceback (most recent call last):
File "/home/prosper/Desktop/Doris/Doris-master/doris_stack/main_code/doris_main.py", line 28, in
doris_sentinel_1.run(args.parameterfilepath, start_date, end_date, master_date)
File "/home/prosper/Desktop/Doris/Doris-master/doris_stack/main_code/doris_sentinel_1.py", line 88, in run
processing.initialize()
File "/home/prosper/Desktop/Doris/Doris-master/doris_stack/main_code/single_master_stack.py", line 175, in initialize
self.create_full_swath()
File "/home/prosper/Desktop/Doris/Doris-master/doris_stack/main_code/single_master_stack.py", line 195, in create_full_swath
self.full_swath[date][dat_type] = copy.deepcopy(self.stack[date][bursts[0]][dat_type])
KeyError: 'master'

Has anyone run into this error yet after running 'bash doris_stack.sh'