A new switch is not created by discovery. The warning is that it cannot connect to the switch, the credential check sais ok.
When you look at the commlog you can see it does connect and gets values, but what goes really wrong?
The warning is:
<< Progress message, Severity: Warning>>
SNMP: Connection failed.
I'll attach the commlog.
I run 10.10 cup2.651 with cp13.03.15