CRP20252
El valor registrado en el campo TipoFactorDR que corresponde a Retención debe ser distinto de Exento.
In English A related document's withholding cannot be exempt.
error: the document is invalid
What the rule checks
As the rule set's publisher wrote it. The rule runs on every element the context matches, and fails where the test is false; the validator reports the line of that element.
Context
pago20:ImpuestosDR/pago20:RetencionesDR/pago20:RetencionDR
Test
not(@TipoFactorDR = 'Exento')
Checked with CFDI 4.0