Error codes ยท National portal upload checks
CBI filing rule: double zipped: Ensure the file is not double zipped.
Rejects the file IE-CBI
Official text
Ensure the file is not double zipped.
How it appears in feedback
Ensure the file is not double zipped.
What triggers it
A zip inside a zip is rejected.
How to fix it
One zip containing the root folder.
Central Bank of Ireland Portal (2026 version performs upfront EBA validations; blocking errors must be fixed before finalise/sign-off, non-blocking ones may be commented in the 'Xbrl Non Blocking Rules Report' and submitted).