[GRASS-user] Rscript error when using v.class.mlR

[Daniel Kozar]

Hi everyone,

When using the extension "v.class.mlR" I get an error [Message 1] (see
below) that "Rscript" cannot be located. I traced this back to the script
for "v.class.mlR" and edited line 908 to read the direct path to Rscript -
'/usr/local/bin/Rscript' rather than 'Rscript' alone. However, when I
re-open GRASS 8.0 I get an error [Message 2] that the extension failed when
loading and that the operation isn't permitted. I allowed for the
application to have administrative rights but it still doesn't work. Does
anyone know how to work around this or solve the issue finding "Rscript"?

I have R running and have installed necessary packages. I'm running GRASS
on MacOS Monterey.

Any help would be appreciated.
- Daniel
-----------------------------------------------------------------------------
*[Message 1]*

Running R now. Following output is R output.

Traceback (most recent call last):

  File "/Users/dankozar/Library/GRASS/8.0/Addons/scripts/v.class.mlR", line
977, in <module>

    main()

  File "/Users/dankozar/Library/GRASS/8.0/Addons/scripts/v.class.mlR", line
908, in main

    subprocess.check_call(

  File
"/Applications/GRASS-8.0.app/Contents/Resources/lib/python3.9/subprocess.py",
line 368, in check_call

    retcode = call(*popenargs, **kwargs)

  File
"/Applications/GRASS-8.0.app/Contents/Resources/lib/python3.9/subprocess.py",
line 349, in call

    with Popen(*popenargs, **kwargs) as p:

  File
"/Applications/GRASS-8.0.app/Contents/Resources/lib/python3.9/subprocess.py",
line 951, in __init__

    self._execute_child(args, executable, preexec_fn, close_fds,

  File
"/Applications/GRASS-8.0.app/Contents/Resources/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: 'Rscript'


*[Message 2]*

Details: <[Errno 1] Operation not permitted: 'v.class.mlR'>

WARNING: Some addons failed when loading. Please consider to update your
addons by running 'g.extension.all -f'.

-- 
Thank you,

Daniel Kozar
PhD Candidate
UC Davis - Hydrologic Sciences
djkozar at ucdavis.edu
(814) 380-6900
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