Error Solver
How to fix: Value '...' is not facet-valid with respect to pattern '[0-9]{4}' for type 'Last4SSNType'.
What happened?
The Employee ID field must contain exactly 4 numeric digits. Full SSNs (9 digits), partial SSNs (1-3 digits), or alphanumeric employee codes all trigger this error. Leading zeros are often stripped by Excel, turning '0123' into '123'.
The Zero-Tolerance Solution
XMLExpress auto-extracts the last 4 digits from any input format and preserves leading zeros — so '123-45-6789' becomes '6789' and '0123' stays as '0123'.
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