NetFlow error notification: No interface found.Device Adding Failed

NetFlow error notification: No interface found.Device Adding Failed

The device has passed the SNMP credentials. The device was also in NetFlow before but was removed. Trying to re-add the device but getting the notification, "No interface found.Device Adding Failed". I only have 2 Netflow interfaces allowed to be monitored. Im not monitoring any at the momenet. So my question is, how do I add and remvoe interfaces to Netflow. Im using OpManager V.12 with Netflow/Flow analysis already added on.

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