Using the UDT Compatibility Check tool i was also seeing authorization errors for the OID 1.3.6.1.2.1.17.4.3 (dot1dTp). Adding this MIB to the SNMP View made no difference. My SNMP view was:
snmp-server group SNMPv3-RO v3 priv read RO
snmp-server view RO iso included
snmp-server view RO dot1dTp included
Then i read (at Cisco IOS Configuration Fundamentals Command Reference, Release 12.2 - SNMP Commands [Cisco IOS Software Releases 12.2 M…):
"Two standard predefined views can be used when a view is required, instead of defining a view. One is everything, which indicates that the user can see all objects. The other is restricted, which indicates that the user can see three groups: system, snmpStats, and snmpParties. The predefined views are described in RFC 1447."
So i changed my view to use this:
snmp-server group SNMPv3-RO v3 priv read everything
no snmp-server view RO
And now it seems to work.