Problem configuring IPM 2.6 Collector

[r-reed]

When trying to configure a Collector I get an error messesage saying "Not a known Entity". I have no idea what this is trying to tell me. The source and targets both show a green status and I'm trying to use DefaultIpEcho as the operation

[b.hsu]

Make sure you have the correct SNMP read and write community strings configured on both the device and the collector on the IPM side.Could you manually add a source with the correct SNMP read and write community strings.Then try the same collector again.