Core Connector Background Check Outbound: TransformBGData ApplyETV Error
The error An unexpected error occurred while processing background event BACKGROUND_CHECK_EVENT-3-6632
An unexpected error with code : -1, has occured at : TransformBGData.request.1.applyETV. Please reference message detail for more information.
What does "An unexpected error occurred while processing background" mean in Workday Core Connector?
The Background Check Order Outbound core connector failed partway through its internal data transform step (TransformBGData) while applying an effective-to-value to a background check event. Workday could not process that specific event and stopped with a generic internal error code instead of a descriptive one.
Quick fix
Exclude or manually process the specific background check event that triggers the error so the rest of the outbound batch can complete, then rerun the connector.
Permanent fix
Log a Workday Support case with the event ID and full error detail; this is a known internal transform issue that Workday resolves case by case rather than something fixable purely through integration configuration.
Troubleshooting
- Open the integration's error notification or the run's message log and note the exact background check event ID referenced in the error (BACKGROUND_CHECK_EVENT-#).
- Check the worker's background check status and history for that event; look for an event that was cancelled, superseded, or has an unusual effective date.
- Compare a working run against the failing one to see if a specific candidate or event triggered the -1 code.
- If the event looks clean on the Workday side, capture the full error detail (not just the summary line) and open a Workday Support case referencing the TransformBGData.request.1.applyETV step, since this is an internal transform failure Workday needs to diagnose.
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