Hi, I have written a skeleton for python script for centreon. The problem is that the script works fine until I import the pyrfc library, which is the key for this script.
Without this library centreon returns me a green OK message which is fine.
Once the library is there, it returns No output returned from plugin. If I run the script through the OS under the user centreon-engine it works fine even with the library. I have the latest version of pyrfc and it works fine because I use it in other scripts, it just doesn't work in the centreon UI. My command is : /usr/bin/env python3 /usr/lib/nagios/plugins/SCRIPTS/test.py (working fine from OS)

What I've tried so far:
set chmod 777 on the script
change the owner to centreon-engine
run the script on the OS under the user centreon-engine - works
reinstall pyrfc library
checked Python versions
 

My Code:

#!python

__author__ = 'xxxx'
__version__ = 0.1

import os
import time
import pyrfc  # If I comment remove this line, it works.
from optparse import OptionParser, OptionGroup
import logging as log
import argparse
import subprocess

os.environ."NWRFCSDK_INCLUDE"] = "/usr/local/sap/nwrfcsdk/include"
os.environ."NWRFCSDK_LIBS"] = "/usr/local/sap/nwrfcsdk/lib"
os.environ."SAPNWRFC_HOME"] = "/usr/local/sap/nwrfcsdk"

# Initialize parser
parser = argparse.ArgumentParser()
parser.add_argument("-d", "--destination", help="Define RFC destination.")

# Read arguments from command line
args = parser.parse_args()

def main():
    """ Main plugin logic """

    with open('/usr/lib/nagios/plugins/SCRIPTS/output_rfc.txt') as f:
        lines = f.readlines()
        integer = int("".join(str(x) for x in lines))
    if integer == 0:
        gtfo(0, "OK - destination {} reached.".format(args.destination))
    elif integer == 2:
        gtfo(2, "CRITICAL - destination {} does not exist.".format(args.destination))
    elif integer == 3:
        gtfo(1, "WARNING - {} is illegal destination type 'G'.".format(args.destination))
    else:
        gtfo(2, "CRITICAL - destination {} unreachable.".format(args.destination))

def gtfo(exitcode, message=''):
    """ Exit gracefully with exitcode and (optional) message """

    if message:
        print(message)
    exit(exitcode)

if __name__ == '__main__':
    main()

Thanks in advance for the help.