Would you like to apply the gain mapping corrections from the file
  ./gain_cal_mapping.in
to existing parameters for all instruments COMMON to the master parameter file
and the gain mapping coefficients input file, and save the result to
an intermediate file?: (y/n):[n]: y
[ERROR | 07/28/14 15:42:18]cbpm_apply_gain_mappings:  Cannot open input file: ./gain_cal_mapping.in
Prep() function status = 6
'Prep' returned failure.  Back to menu.
[INFO  | 07/28/14 15:42:18]  Begin post-command status check/recovery:   ...