Missing library Error: classy.pyx file

[RubenArjona]

Hi,

I have installed at the hydra cluster of the IFT the Planck 2018 likelihoods, CLASS and MontePython.

In MontePython, when I run a script serially then I produce chains as expected. The problem comes when I submit a job to the cluster. Then I get the following error message:
"Missing Library Error: You must have compiled the classy.pyx file. Please go to
/path/to/class/python and run the command python setup.py build"

Following the above steps I have this message:
"running build
running build_ext
skipping 'path/class/python/../python/classy.c' Cython extension (up-to-date)"

but my problem still persists with the message: "Missing library Error ... " when trying to send a job to the cluster. I emphasize that I can produce chains when I run the script serially.

This is my script:

#!/bin/sh
#SBATCH -J MPtest
#SBATCH --partition=batch
#SBATCH --get-user-env
#SBATCH -o ./job.%j.out
#SBATCH -e ./job.%j.err
#SBATCH -N 2
#SBATCH -n 2
#SBATCH -t 3-00:00:00

export OMP_NUM_THREADS=8

prun python montepython/MontePython.py run -p input_RA/base2018TTTEEE.param -o chains_RA -N 15000

Compiler versions:
My gcc version is: 4.8.3
My icc version is: 16.0.0
My python version is: 2.7.13 Entough

How can I solve this issue on sending jobs to the cluster?

Many thanks!
Rubén