Type 1 street cross reference not added: check usrns are valid/xref is allowed [USRN1] [USRN2]
This error is shown when a type 12 XREF record is invalid. Consult pages 12/13 of the DTF 8.1 specification for guidance.
https://www.geoplace.co.uk/helpdesk/library/-/asset_publisher/r91RWkfXFemB/document/id/43413
The most common cause is that a type 1 or 2 street is cross referenced to another type 1 or 2 street.
Raise the error with the supplier of the file or GeoPlace and ask them to correct the problem record.
DTF 8.1 Specification: https://www.geoplace.co.uk/helpdesk/library/-/asset_publisher/r91RWkfXFemB/document/id/43413
NSG Data Entry Conventions: https://www.geoplace.co.uk/helpdesk/library/-/asset_publisher/r91RWkfXFemB/document/id/43350
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