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| Tip |
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| In this event, the Customer should contact MF Support Contact in order to confirm the validity of the specified credentials. |
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If the Client msgSeqNum is lower than the Gateway's expected value, or the Client is expecting a sequence number higher than the Gateway's next-to-be-assigned msgSeqNum, then this is an unrecoverable error and the Gateway will abort the session with a Logout message (using it's next sequence number).
Tip The Customer should contact MF Support Contact to agree the correct resolution actions. - Otherwise, the Gateway will issue a LogonResponse message - populating NextExpectedMsgSeqNum which contains the next msgSeqNum value that it expects to receive from the Client.
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