The spec says, in section 4.2.3.2.4, that if there is an error severity of Error, ... there is an unrecoverable error in the message and no further messages will be generated as part of the conversation. How can we then continue to send retries after an ErrorList with error severity of Error ? Maybe the problem we need to clarify is in the Error section rather than in the RM section? OTOH, maybe the statement in 4.2.3.2.4 is enough. Regards, David.