terminate called after throwing an instance of 'mapped_file::ErrorMMap'
  what():  Can't open file 'a.dbm':
/bin/sh: line 1: 29698 Aborted                 /jellyfish qdump -c:\a.dbm > a.list.qcts
Optimization of distribution likelihood function to choose k-mer cutoff failed. Very likely you have set the value of k too high or not provided adequate coverage (>15x). Inspect the k-mer counts for a clear separation of the error and true k-mer distributions.
Guessing quality values are on ascii 64 scale
Traceback (most recent call last):
  File "./quake.py", line 287, in ?
    main()
  File "./quake.py", line 124, in main
    cutoff = get_cutoff()           
  File "./quake.py", line 163, in get_cutoff
    exit(1)
TypeError: 'str' object is not callable