From the FIG:
An invalid Preapproval data field was provided. Please review the information below and update your file accordingly.
1) Preapproval must equal 1 or 2, and cannot be left blank.
2) If Action Taken equals 7 or 8, then Preapproval must equal 1.
3) If Action Taken equals 3, 4, 5 or 6, then Preapproval must equal 2.
4) If Preapproval equals 1, then Action Taken must equal 1, 2, 7 or 8.
HMDA Wiz just refers back to the FIG.