High severitygateway
Power BI Refresh Error:
DM_GWPipeline_Gateway_UnknownError
What does this error mean?
An unclassified error occurred within the on-premises data gateway pipeline. This error code is a catch-all when the gateway cannot map the failure to a more specific error category.
Common causes
- 1The gateway process crashed or was forcefully terminated during a refresh
- 2A memory overflow on the gateway machine during the processing of a large dataset
- 3A bug or unhandled exception in the gateway version currently installed
- 4Antivirus software quarantined a gateway component mid-operation
- 5The gateway's working directory ran out of disk space
How to fix it
- 1Check Windows Event Viewer on the gateway machine for crash or error entries at the time of the failure
- 2Review the gateway's own log files (typically in %LocalAppData%\Microsoft\On-premises data gateway\)
- 3Ensure the gateway machine has sufficient free disk space (at least several GB for temp files)
- 4Update the gateway to the latest version — many unknown errors are fixed in subsequent releases
- 5If the error is intermittent, add more memory to the gateway VM or reduce the number of concurrent refreshes