Reject (35=3)

Tag	Field Name	Req’d	Type	Comments
Header 8 BeginString Y String Identifies beginning of new message and contains FIX protocol version. Always first field in message. Value must be set to FIX.4.2 or FIX.4.4 9 BodyLength Y Int Number of bytes in message body. 35 MsgType Y String Identifies FIX message type. 34 MsgSeqNum Y Int Message sequence number 43 PossDupFlag C Boolean Indicates possible retransmission of message with this sequence number Always required for retransmitted messages, whether prompted by the sending system or as the result of a resend request. Valid values: - Y: Possible duplicate - N: Original transmission 49 SenderCompID Y String(32) Trader logon name 50 SenderSubID N String Identifies specific message originator If present, will be sent to exchange as-is (where applicable) 52 SendingTime Y UTC Timestamp Time of message transmission 56 TargetCompID Y String(32) Identifies entity receiving the message. Not validated by server. 116 OnBehalfOfSubID N String(32) Trading partner SubID used when delivering messages via a third party. 122 OrigSendingTime C UTCTimestamp Original time of message transmission when transmitting orders as the result of a resend request. Always required for messages resent as a result of a ResendRequest. If data is not available set to same value as SendingTime 129 DeliverToSubID N String(32) Trading partner SubID used when delivering messages via a third party. 142 SenderLocationID N String(32) Identifies specific message originator’s location (i.e. geographic location and/or desk, trader) If present, will be sent to exchange as-is (where applicable)
45	RefSeqNum	Y	SeqNum	Reference message sequence number.
58	Text	Y	String	Reason for rejection.
371	RefTagID	Y	Int	Tag number of the referenced FIX message.
372	RefMsgType	Y	String	Message type associated with the referenced FIX message.
373	SessionRejectReason	Y	Int	Possible values: 0: Invalid tag number 1: Required tag missing 2: Tag not defined for this message type 3: Undefined tag 4: Tag specified without a value 5: Incorrect value 6: Incorrect data format for a tag value 7: Decryption problem 8: Signature problem 9: CompID problem 10: Sending time accuracy problem 11: Invalid message type 99: Other
Trailer 10 Checksum Y String Three byte checksum. This tag must always be the last field in a message (i.e. it serves, with the trailing <SOH>, as the end-of-message delimiter).