Rule library
UAD1431FatalField 21.007Sales Comparable

A numeric identifier ('Comparable #') must be assigned for each sales comparable. For assistance with this message, contact the appraisal software vendor.

Where this rule lives in the report

Sales Comparison Approach; Prior Sale and Transfer History
Comparable
General Information; Comparable Transfer History

Report Section and Report Subsection as the GSEs define them — the black tab and grey bar you already read on the URAR.

Severity
Fatal — this blocks your UCDP submission and must be fixed before delivery.
Triggered when
@ValuationUseType = "SalesComparable" and PropertyOrdinalNumber is not provided
Data Point Name
PropertyOrdinalNumber
Unique ID
1800.0192
Report Field ID
21.007
What this field means
A positive, whole number that identifies the position of the property in the valuation analysis.

Seen in the sample reports

How this field is populated in the official UAD 3.6 sample scenarios.

More rules in “Sales Comparison Approach; Prior Sale and Transfer History”