logging

[hkershaw-brown]

DART does std out for everything
Running assimilate.py interactively

/glade/derecho/scratch/hkershaw/da-mom6-test.0007/run$ /glade/work/hkershaw/crocodile_dec2025/FreshCheckout/CESM_Jan2/components/dart/cime_config/assimilate.py /glade/work/hkershaw/crocodile_dec2025/cases/da-mom6-test.0007

You get no output because

result = subprocess.run(cmd, shell=True, check=True,
capture_output=True, text=True)

except subprocess.CalledProcessError as e:
logger.error(f"Filter failed with return code {e.returncode}")
logger.error(f"Filter stdout: {e.stdout}")
logger.error(f"Filter stderr: {e.stderr}")
raise

[hkershaw-brown]

Capturing stdout because DART does not write errors to stderr: NCAR/DART#994

[hkershaw-brown]

You can set logging level to DEBUG to print captured stderr

DART_interface/cime_config/assimilate.py

Line 29 in 45e51b9

logging.basicConfig(level=logging.INFO)

or write captured err to file

    logger.info("Filter completed successfully")
    logger.debug(f"Filter stdout: {result.stdout}")
    logger.debug(f"Filter stderr: {result.stderr}")

    # Write stdout and stderr to a file
    #with open("filter_output.log", "w") as f:
    #    f.write("STDOUT:\n")
    #    f.write(result.stdout)
    #    f.write("\nSTDERR:\n")
    #    f.write(result.stderr)

or maybe at some point dart will make use of sterr.