Overview

The issue affecting the processing of CZK, RON, and HUF payments has been fully resolved. A fix was deployed on 6 May, which restored normal service behaviour.

All impacted payments originally value dated 5th and 6th May were successfully resubmitted and processed with a revised value date of 7th May.

Root Cause

The incident was caused by the restoration of an outdated backup of the emissions directory and its associated [default.fa] files during a separate directory creation process. These files were from a version predating the AutoClient 1.6.5 upgrade and were no longer compatible with the newer client.

As a result, payment processing failures occurred due to incompatibility in the [.fa] file format, which led to XMLv2 binary prefix errors under AutoClient 1.6.5.

Resolution and Preventative Actions

All [.fa] default files have been updated to the correct format across all relevant servers.

The process that previously allowed restoration of outdated emissions directories has been updated to prevent this from occurring again.

Additional validation checks have been introduced to ensure compatibility of companion files before deployment.