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The Sequence Reset(4) is to recover from an out-of-sequence condition, to reestablish a FIX session after a sequence loss. The MsgSeqNum(34) in the header is ignored.

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Arguments

TagNameTypeRequiredComments
36NewSeqNoSeqNumYesNew Sequence Number

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Response

In reply to Sequence Reset(4), the exchange replies with Resend Request(2) with BeginSeqNo(7) and EndSeqNo(16) equal to the passed NewSeqNo(36) in case of success. In case of wrong arguments, the server replies with Resend Request(2) with BeginSeqNo(7) and EndSeqNo(16) equal to the current incoming sequence on the server. The Sequence Reset (4) can only increase the sequence number. If a Sequence Reset(4) is received attempting to decrease the next expected sequence number the reply is Resend Request(2) with BeginSeqNo(7) and EndSeqNo(16) equal to the current incoming sequence on the server. After sending the correct Sequence Reset(4), the client should start sending messages starting from the sequence number equal to the NewSeqNo(36) passed.