Sequence Reset Message Fields

Table 1. Sequence Reset Message Fields
Tag	Field Name	Required	Description
35	MsgType	Y	4
36	NewSeqNo	Y	Next expected sequence number.
123	GapFillFlag	N	Sequence Reset - Gap Fill messages (GapFillFlag = Y) must be received in sequence. Any messages (including any Gap Fills) sent in response to a Resend Request should have PossDup = Y. Sequence Reset - Reset (GapFillFlag not ‘Y’) is used only as a last resort, and always by human intervention, to allow an otherwise hopelessly confused session to be resumed. In these cases all chance at automatic message recovery are lost.