10xxx · Message header
CESOP error 10100
“The reporting period cannot be updated”
Only CESOP can raise it
What it means
A correction tried to change the reporting period of data CESOP already holds. The period of filed data cannot be updated by a correction.
Why files get it
- Payments reported under the wrong quarter, 'fixed' by correcting the period rather than the records.
How to fix it
- Delete the affected payees (CESOP3) in a correction for the period they were filed under.
- Report them as new data in the message for the quarter they belong to.
Catch the rest before you file
10100 depends on data CESOP already holds, so no validator can raise it in advance. Most of the catalogue does not: the free validator checks a file against every rule that can be tested before submission and names the CESOP error each finding would become.
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Source: the error catalogue in the Payment Data XSD User Guide — CESOP, v4.40 (DG TAXUD), §2.2.3.18. The explanation is ours; it describes the file format and is not tax advice.