Exit Code 137 using NRPE

[Jurgens, Matthew]

I am running a simple service check using NRPE:

on the Nagios host if I run it manually like:
# /usr/local/nagios/libexec/check_nrpe -H pokemon -c check_maj -t 180
Performance Check OK

# echo $?
0

It works perfectly

The NAgios config to execute it is (basically what I ran manually)
command_line    /usr/local/nagios/libexec/check_nrpe -H $HOSTADDRESS$ -c
$ARG1$ -t 180

The service definition is
# Service definition
define service{
        use                             generic-service         ; Name of
service template to use

        host_name                       pokemon
        service_description             MAJ
        is_volatile                     0
        check_period                    24x7
        max_check_attempts              3
        normal_check_interval           1
        retry_check_interval            1
        contact_groups                  nagios-admins
        notification_interval           120
        notification_period             24x7
        notification_options            c,r
        check_command                   check_nrpe!check_maj
}

and yet when it runs under Nagios it always returns 

Current Status:	  CRITICAL    
Status Information:	(Return code of 137 is out of bounds)

What is exit code 137?
Any ideas?





The script it is running is nothing special
it is simply

#!/usr/bin/ksh
#echo "Performance Check OK|1:0.8:0.7:0.7"
echo "Performance Check OK"
exit 0

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