The "Error-Message" AVP

The "Error-Message" Diameter AVP, which is of type UTF8String, uses the AVP code "281".

It is part of the Re-Auth-Answer, Session-Termination-Answer, Abort-Session-Answer, Accounting-Answer, NAT-Control-Answer, IKEv2-SK-Answer, Capabilities-Exchange-Answer, Disconnect-Peer-Answer, Device-Watchdog-Answer, Capabilities-Update-Answer, MIP6-Answer, AA-Mobile-Node-Answer, Home-Agent-MIP-Answer, Diameter-EAP-Answer, Credit-Control-Answer, Trigger-Establishment-Answer, NS-Answer, NC-Answer, Non-Aggregated-RUCI-Report-Answer, Aggregated-RUCI-Report-Answer, 3GPP-Device-Action-Answer, 3GPP-Device-Notification-Answer, AA-Answer, Spending-Limit-Answer, Spending-Status-Notification-Answer, GCS-Action-Answer, GCS-Notification-Answer, BT-Answer, EC-Answer, ER-Answer, TDF-Session-Answer, TN-Answer, PX-Answer, XA-Answer, Session-Termination-Request commands.