A method and system for adding a notification to an error message. A first node and a second node are positioned in a communication network, and the first node is different from the second node. The first node is configured to process a network message before sending the network message to the second node. The first node encounters an error when processing the network message, and, before sending the network message to the second node, writes a reason of the error in a header section of the network message. The first node is configured to send the network message to the second node with the header section.