OID too long for access point?

Hello,

I have an OID for getting the total number of connected devices to an access point and its radio's. I tried this on two different access point models from the same company (Huawei). One access points gives the number of users just fine, but the other access point gives an error that the OID is too long. However, further testing has shown that both access points know the OID for the user count.

Is there a known issue with OID's being too long for specific devices?

oid snmp too-long