What causes UserErrorTriggerStartFailed?

An event-based trigger's storage account event subscription was deleted or is in an error state. The trigger has a past end time and cannot fire new pipeline runs. The linked service or storage account used by the trigger was deleted or reconfigured. The ADF factory's managed identity lost permission to create event subscriptions on the storage account

How do I fix UserErrorTriggerStartFailed?

In ADF Studio, stop and delete the failing trigger, then recreate it to re-register the event subscription.. Verify the trigger's start and end time — the end time must be in the future.. Confirm the ADF managed identity has 'EventGrid EventSubscription Contributor' role on the storage account.. Check the Azure portal under the storage account > Events > Event subscriptions to see if the ADF subscription is healthy.. Review the ADF activity log for detailed error messages about why the trigger failed to register.

High severitydata source

Power BI Refresh Error:
UserErrorTriggerStartFailed

What does this error mean?

An Azure Data Factory trigger failed to start a pipeline run. This occurs most often with event-based triggers when the storage account event subscription is broken, or with schedule triggers that have an invalid configuration.

Common causes

1An event-based trigger's storage account event subscription was deleted or is in an error state
2The trigger has a past end time and cannot fire new pipeline runs
3The linked service or storage account used by the trigger was deleted or reconfigured
4The ADF factory's managed identity lost permission to create event subscriptions on the storage account

How to fix it

1In ADF Studio, stop and delete the failing trigger, then recreate it to re-register the event subscription.
2Verify the trigger's start and end time — the end time must be in the future.
3Confirm the ADF managed identity has 'EventGrid EventSubscription Contributor' role on the storage account.
4Check the Azure portal under the storage account > Events > Event subscriptions to see if the ADF subscription is healthy.
5Review the ADF activity log for detailed error messages about why the trigger failed to register.

Frequently asked questions

Does this error affect all pipeline runs or just the current one?

Depends on the root cause. A persistent misconfiguration fails every run; a transient issue may resolve on retry. Check the run history.

Can this error appear in Azure Data Factory and Microsoft Fabric pipelines?

Yes — the same connector errors appear in both ADF and Fabric Data Factory pipelines.

How do I see the full error detail for an ADF pipeline failure?

In ADF Monitor, click the failed run, then the failed activity. The detail pane shows the error code, message, and sub-error codes.

Will downstream Power BI datasets be affected when an ADF pipeline fails?

Yes — a dataset refreshing after the pipeline will use stale data or fail if the target table was cleared. The Power BI refresh may succeed while serving wrong data.

Official documentation: https://learn.microsoft.com/en-us/azure/data-factory/data-factory-troubleshoot-guide