FileNotFoundError: [Errno 2] No such file or directory: 'sgbm'

[limiao766]

When I use a different matching method, I change "matching_algorithm": "mgm" in the config.json file to "matching_algorithm": "sgbm", but an error is reported:

(S2P) lph@ubuntu:~/s2p$ s2p tests/data/input_pair/config.json
tile size: 286 286
total number of tiles: 49 (7 x 7)

discarding masked tiles...
done 49 / 49 tiles
Elapsed time: 0:00:00.395041

1. correcting pointing locally...
   done 36 / 36 tiles
   Elapsed time: 0:00:12.690004

2. correcting pointing globally...
   Elapsed time: 0:00:00.026180

3. rectifying tiles...
   done 36 / 36 tiles
   Elapsed time: 0:00:09.774118

4. running stereo matching...
   multiprocessing.pool.RemoteTraceback:
   """
   Traceback (most recent call last):
   File "/home/lph/anaconda3/lib/python3.9/multiprocessing/pool.py", line 125, in worker
   result = (True, func(*args, **kwds))
   File "/home/lph/s2p/s2p/parallel.py", line 43, in tilewise_wrapper
   out = fun(*args)
   File "/home/lph/s2p/s2p/init.py", line 184, in stereo_matching
   block_matching.compute_disparity_map(rect1, rect2, disp, mask,
   File "/home/lph/s2p/s2p/block_matching.py", line 128, in compute_disparity_map
   common.run('sgbm {} {} {} {} {} {} {} {} {} {}'.format(im1, im2,
   File "/home/lph/s2p/s2p/common.py", line 92, in run
   subprocess.run(cmd, shell=shell, stdout=sys.stdout, stderr=sys.stderr,
   File "/home/lph/anaconda3/lib/python3.9/subprocess.py", line 505, in run
   with Popen(*popenargs, **kwargs) as process:
   File "/home/lph/anaconda3/lib/python3.9/subprocess.py", line 951, in init
   self._execute_child(args, executable, preexec_fn, close_fds,
   File "/home/lph/anaconda3/lib/python3.9/subprocess.py", line 1821, in _execute_child
   raise child_exception_type(errno_num, err_msg, err_filename)
   FileNotFoundError: [Errno 2] No such file or directory: 'sgbm'
   """

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/home/lph/anaconda3/bin/s2p", line 33, in
sys.exit(load_entry_point('s2p', 'console_scripts', 's2p')())
File "/home/lph/s2p/s2p/cli.py", line 25, in main
s2p.main(user_cfg, start_from=args.start_from)
File "/home/lph/s2p/s2p/init.py", line 590, in main
parallel.launch_calls(stereo_matching, tiles_pairs, nb_workers_stereo,
File "/home/lph/s2p/s2p/parallel.py", line 102, in launch_calls
outputs.append(r.get(timeout))
File "/home/lph/anaconda3/lib/python3.9/multiprocessing/pool.py", line 771, in get
raise self._value
FileNotFoundError: [Errno 2] No such file or directory: 'sgbm'