I get error No such instance "(SNMP error # 223)" when I try to add an snmp sensor for a custom oid, 18.104.22.168.22.214.171.124.126.96.36.199. I do get a correct value if I do an snmp walk using an snmp tester, but get the same error if I simple try to poll the oid. (this does work with other tools). The oid is for a cisco voice gateway to monitor active calls.
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