The version of the AFD definition the message was built with: 001.04 for Release 2026, 001.05 for Release 2027. The feedback message counts separately: 001.01 in Release 2026, 001.02 in Release 2027. Note: the Release 2027 pre-release (17 July 2026) and the final release (12 October 2026) both carry 001.05. A message built on the pre-release therefore states the right version and can still be rejected, for example on afdDefinitionName.
Attribution. Source: SIVI – VB-PUO Standard. Schemas, attribute descriptions and code lists are taken unchanged from the VB-PUO Standard (owned by the Pensioenfederatie, managed by SIVI) and shown with their release and version. Explanations, examples, error descriptions and translations are by WTP Data Lab and are not part of the standard. GitHub Stichting-SIVI/VBPUOdsk · Manual · sivi.org