The syntax of this message is specified in section

This message is received by a client from the server as part of a wxf:ReceiveResponse (section targeted to a pipeline. The server sends this message to notify a client about a pipeline's Error data.

A client's pipeline MUST be in a Running state while processing this message.

It is up to a client to process this message and transmit the data to the higher-layers.

For more details about how a client executes a pipeline on a server, see section