j (Business message reject)

The j (Business Message Reject) message indicates that the application-level message was received and satisfies session-level rules, but:

Could not be processed, for example, due to an application-level rule violation, and
Cannot be rejected with other means, for example, with 9 Order Cancel Reject

Tag	Name	Type	Required	Description
45	`RefSeqNum`	`SeqNum`	no	Reference message sequence number.
372	`RefMsgType`	`String`	yes	35 `MsgType` of the FIX message being referenced.
379	`BusinessRejectRefID`	`String`	no	The value of the business-level ID field in the message being referenced.
380	`BusinessRejectReason`	`Int`	yes	Code to identify the reason for a `j` (Business Message Reject) message. Supported values: `0` - Other `1` - Unknown ID `2` - Unknown Security `3` - Unsupported Message Type `4` - Application not available `5` - Conditionally Required Field Missing `6` - Not authorized
58	`Text`	`String`	no	Reason for the reject, in free format text string.