Fail to start parpool on cluster

Hello, I'm submitting a batch job using SLURM:

sbatch shllscrpt96_16jul2024.sh false iter 1

shllscrpt96_16jul2024.sh itself looks like:

#!/bin/bash 
#SBATCH -n 96                    
#SBATCH --mail-type="ALL"
#SBATCH --mem-per-cpu=8000M 
module purge 
module load matlab/2023b 
matlab -nosplash -nodesktop -nodisplay -r "scriptfun_11jul2024($1,'$2',$3); exit"

scriptfun_11jul2024(run_Spec, ms_Display, Category_MS) itself looks like:

function scriptfun_11jul2024(run_Spec,ms_Display,Category_MS)
n_cores = str2double(getenv('SLURM_NTASKS'));
pool = parpool('local', n_cores);
"lots of statements (I'm happy to provide more details, but I'm 100% sure this is not the part causing the problem..)"
delete(pool)
end

The batch job "successfully" completes, but the output file shows that it failed:

Starting parallel pool (parpool) using the 'local' profile ...
Preserving jobs with IDs: 13 14 15 16 because they contain crash dump files.
You can use 'delete(myCluster.Jobs)' to remove all jobs created with profile Processes. To create 'myCluster' use 'myCluster = parcluster('Processes')'.
Parallel pool using the 'Processes' profile is shutting down.

{Error using parpool
Parallel pool failed to start with the following error. For more detailed
information, validate the profile 'Processes' in the Cluster Profile Manager.

Error in scriptfun_11jul2024 (line 13)
pool = parpool('local', n_cores);

Caused by:
    Error using
    parallel.internal.pool.AbstractInteractiveClient>iThrowWithCause
    Failed to initialize the interactive session.
        Error using
        parallel.internal.pool.AbstractInteractiveClient>iThrowIfBadParallelJobStatus
                The interactive communicating job failed with no message.
}

I'd appreciate any and all thoughts on what I might have done wrong. Thank you so much!

[Edric Ellis]

I suggest contacting MathWorks support who can help you with further debugging steps to see why parpool failed in this case.