snmpget error in Nagios but not in terminal

Hi there, I’m getting a weird error and I still don’t know what is causing it.
I installed the plugin and it returns results but only in the terminal like this:
[root@localhost libexec]# ./check_mikrotik_mem -H 192.168.0.254
SNMP OK – Using 38% of the total 1894MB memory. | data=38

But in Nagios it’s giving me this error:
(No output on stdout) stderr: /usr/local/nagios/libexec/check_mikrotik_mem: line 179: snmpget: command not found

But I have net-snmp-5.7.2.1 installed and the check_snmp plugin is working without any problems.

I just don’t know why is giving me an error in Nagios but not in the terminal…strange

Hope you can help me, thanks in advance 🙂

Best regards