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FIXsession: drop copy35=4
With GapFillFlag=Y this stands in for messages that will not be resent and MsgSeqNum remains meaningful. With GapFillFlag=N it is a hard reset: the counterparty jumps to NewSeqNo and ignores MsgSeqNum. Direction: Either direction
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required
35=4
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boolean
Whether this is a gap fill, in which case MsgSeqNum stays valid, or a hard sequence reset.Possible values:
  • Y : Gap fill - this SequenceReset stands in for messages that will not be resent; MsgSeqNum stays valid.
  • N : Hard sequence reset - ignore MsgSeqNum and jump to NewSeqNo.
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SeqNum
required
Sequence number the counterparty should expect next.
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required