convert from mcool does not seem to work

[ripkrizbi]

Hi, I'm trying to prepare a contact map for instagraal and I'm unable to get the required format out of hicstuff. If I run the pipeline with default parameters, the pipeline runs successfully and outputs mcool. So far so good.

But, either trying to convert post-hoc (hicstuff convert), or running the original pipeline with -M graal results in an output error, complaining about an unsuccessful uft8 conversion:

Traceback (most recent call last):
  File "/home/kristian/miniconda3/bin/hicstuff", line 8, in <module>
    sys.exit(main())
  File "/home/kristian/miniconda3/lib/python3.10/site-packages/hicstuff/main.py", line 57, in main
    command.execute()
  File "/home/kristian/miniconda3/lib/python3.10/site-packages/hicstuff/commands.py", line 891, in execute
    hpi.full_pipeline(
  File "/home/kristian/miniconda3/lib/python3.10/site-packages/hicstuff/pipeline.py", line 1004, in full_pipeline
    hcd.attribute_fragments(pairs, pairs_idx, restrict_table)
  File "/home/kristian/miniconda3/lib/python3.10/site-packages/hicstuff/digest.py", line 176, in attribute_fragments
    pairs_header = hio.get_pairs_header(pairs_file)
  File "/home/kristian/miniconda3/lib/python3.10/site-packages/hicstuff/io.py", line 1299, in get_pairs_header
    line = pairs.readline()
  File "/home/kristian/miniconda3/lib/python3.10/codecs.py", line 322, in decode
    (result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x8b in position 1: invalid start byte

A quick glance at the code (and help) tells me that the format supported for conversion is the cool and not mcool, so am I right to suspect that the conversion functionality is missing at the moment?
Also a quick google with the utf-8 error shows there may be missing a binary flag when opening the file and I suspect this may be because of the fact that the file is NOT cool then it is open as something else...

Any help in getting the graal-compatible output (preferably without re-running the mapping) would be much appreciated!

Thanks!