Relation, authorisation and sequence errorsRelation & missing element

CDS12135Relation Error: Country of Export (DE 5/14) must be supplied at either header or item level

HMRC explanation

Relation error
Country of export is mandatory at header or item level when declaring additional procedure code 1CD, 1CG, 2CG or 2CD. On a C21I with procedure code 0002, 0003, 0004, 0005, 0006 or 0007.

Source: HMRC, Customs Declaration Service error codes, Open Government Licence v3.0. GOV.UK publication · Licence

What to check across the Relation, authorisation and sequence errors

Two elements, or a value and a rule, disagree. Read both elements together: completing one element with a particular code often requires another value, and the fault is frequently in the element you did not change. The family also covers parties and authorisations that are not recognised, references that must be unique, and messages sent out of sequence.

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Source: HMRC, Customs Declaration Service error codes, Open Government Licence v3.0. GOV.UK publication · Licence