SNMP V3 is not working on Catalyst 1000 switch

[sumitdas]

I am trying to configure SNMP V3 on one of our Catalyst 1000 access switches. I am using the following ccommands.

#snmp-server group group1 v3 priv ro readonly

#snmp-server engineID 0123456789

#snmp-server user user1 group1 v3 auth sha password1********** password***

I can verify my configuration (Show snmp user/group) on the switch itself but when i am using Paessller SNMP tester to get the Device Uptime, i am getting "SNMP Datatype: SNMP_EXCEPTION_NOSUCHOBJECT" error, but the SNMP V2C is working perfectly fine here. I am getting the device uptime in Paessller SNMP tester and in PRTG monitoring tool using a SNMP V2 community string.

Am i making missing something? 

Thanks for your help.

[marce1000]

    - Could you try some snmp v3 based command line testing with snmpget and or snmpwalk ; here are some examples :
                                       https://www.linickx.com/snmpwalk-v3-and-snmpget-v3-examples

 M.