If a required segment is missing and does not appear in the entire
message, this exception is thrown.
MessageSegmentIndex is always at the last segment of the input
message.
Error Code: 0x80002008
Description: Required segment Message.Position
001.Loop2000B.SBR[(T)|(S)|(P)] was expected but not found at the
position specified in the message grammar ST BHT [REF] NM1....
SegmentRepeatIndex: 0
GrammarSegmentName: SBR
MessageSegmentIndex: 115