Identifies reason for rejection.
Valid values:
| '0' | unknown account(s) |
| '1' | incorrect quantity |
| '2' | incorrect average price |
| '3' | unknown executing broker mnemonic |
| '4' | commission difference |
| '5' | unknown OrderID (37) |
| '6' | unknown ListID (66) |
| '7' | other |
Used in: