findFeaturesSegment.py fails with child/parent communication errors

[lwellerastro]

ISIS version(s) affected: 9.0.0-RC1

Description
Program appears to start working then fails with errors:

INFO:kalasiris.kalasiris:segment from=MyWorkDir/M105939370LE.lev1.cub nl=30000 overlap=0 -pref=$ISISROOT/IsisPreferences
INFO:kalasiris.kalasiris:segment from=MyWorkDir/M1120292097RE.lev1.cub nl=30000 overlap=0 -pref=$ISISROOT/IsisPreferences
INFO:kalasiris.kalasiris:segment from=MyWorkDir/M1342772956LE.lev1.cub nl=30000 overlap=0 -pref=$ISISROOT/IsisPreferences
INFO:kalasiris.kalasiris:segment from=MyWorkDir/M1133330211LE.lev1.cub nl=30000 overlap=0 -pref=$ISISROOT/IsisPreferences
INFO:kalasiris.kalasiris:segment from=MyWorkDir/M1342772956RE.lev1.cub nl=30000 overlap=0 -pref=$ISISROOT/IsisPreferences
INFO:kalasiris.kalasiris:segment from=MyWorkDir/M1130970104LE.lev1.cub nl=30000 overlap=0 -pref=$ISISROOT/IsisPreferences
INFO:kalasiris.kalasiris:segment from=MyWorkDir/M1133330211RE.lev1.cub nl=30000 overlap=0 -pref=$ISISROOT/IsisPreferences
Had an ISIS error:
segment from=MyWorkDir/M1133330211LE.lev1.cub nl=30000 overlap=0 -pref=$ISISROOT/IsisPreferences

**PROGRAMMER ERROR** Isis child process failed to communicate with parent.

Had an ISIS error:
segment from=MyWorkDir/M1133330211RE.lev1.cub nl=30000 overlap=0 -pref=$ISISROOT/IsisPreferences

**PROGRAMMER ERROR** Isis child process failed to communicate with parent.

Had an ISIS error:
segment from=MyWorkDir/M1342772956RE.lev1.cub nl=30000 overlap=0 -pref=$ISISROOT/IsisPreferences

**PROGRAMMER ERROR** Isis child process failed to communicate with parent.

This is repeated for every image in the fromlist, then

Traceback (most recent call last):
  File "/usgs/cpkgs/anaconda3_linux/envs/isis9.0.0_RC1/bin/findFeaturesSegment.py", line 447, in <module>
    raise e 
    ^^^^^^^
  File "/usgs/cpkgs/anaconda3_linux/envs/isis9.0.0_RC1/bin/findFeaturesSegment.py", line 443, in <module>
    findFeaturesSegment(ui, workdir) 
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usgs/cpkgs/anaconda3_linux/envs/isis9.0.0_RC1/bin/findFeaturesSegment.py", line 341, in findFeaturesSegment
    output = output.get()
             ^^^^^^^^^^^^
  File "/usgs/cpkgs/isis3/anaconda3_linux/envs/isis9.0.0_RC1/lib/python3.11/multiprocessing/pool.py", line 774, in get
    raise self._value
  File "/usgs/cpkgs/isis3/anaconda3_linux/envs/isis9.0.0_RC1/lib/python3.11/multiprocessing/pool.py", line 125, in worker
    result = (True, func(*args, **kwds))
                    ^^^^^^^^^^^^^^^^^^^
  File "/usgs/cpkgs/isis3/anaconda3_linux/envs/isis9.0.0_RC1/lib/python3.11/multiprocessing/pool.py", line 51, in starmapstar
    return list(itertools.starmap(args[0], args[1]))
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usgs/cpkgs/anaconda3_linux/envs/isis9.0.0_RC1/bin/findFeaturesSegment.py", line 147, in segment
    raise err
  File "/usgs/cpkgs/anaconda3_linux/envs/isis9.0.0_RC1/bin/findFeaturesSegment.py", line 114, in segment
    ret = kisis.segment(work_img, nl=nlines, overlap=0, pref__="$ISISROOT/IsisPreferences")
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usgs/cpkgs/isis3/anaconda3_linux/envs/isis9.0.0_RC1/lib/python3.11/site-packages/kalasiris/kalasiris.py", line 195, in isis_fn
    return _run_isis_program(cmd, subprocess_kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usgs/cpkgs/isis3/anaconda3_linux/envs/isis9.0.0_RC1/lib/python3.11/site-packages/kalasiris/kalasiris.py", line 140, in _run_isis_program
    return subprocess.run(cmd, **subprocess_kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usgs/cpkgs/isis3/anaconda3_linux/envs/isis9.0.0_RC1/lib/python3.11/subprocess.py", line 571, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['segment', 'from=MyWorkDir/M1133330211LE.lev1.cub', 'nl=30000', 'overlap=0', '-pref=$ISISROOT/IsisPreferences']' returned non-zero exit status 3.

How to reproduce
Running under my work users area Isis3Tests/FFSegmentScript/Git5655/I900RC1/

Command line:
findFeaturesSegment.py algorithm=fast/brief maxthreads=7 workdir=MyWorkDir match=../Lev1/M108313384RE.lev1.cub fromlist=M108313384RE_fromlist_ff.lis fastgeom=true geomtype=camera maxpoints=10000 epitolerance=9.0 ratio=0.9 hmgtolerance=9.0 filter=sobel networkid=M108313384RE pointid='M108313384RE_ff_?????' onet=M108313384RE_ff.net tolist=M108313384RE_cubes_ff.lis tonotmatched=M108313384RE_notmatched_ff.lis description='Create image-image control network' debug=true debuglog=M108313384RE_ff.log

Note that the match file and all of the images in fromlist exist in the directory below where I am running things. The workdir exists. Running on an astrovm.

My understanding is nothing has changed with the script and this worked before, albeit with some issues (#5655) that have not been addressed (I think, not sure).