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(VSS_E_WRITERERROR_RETRYABLE) The writer experienced a transient error. - Connect IT Community | Kaseya
<main> <article class="userContent"> <h2 data-id="summary"><strong>SUMMARY</strong></h2> <p>(VSS_E_WRITERERROR_RETRYABLE) The writer experienced a transient error. If the backup process is retried, the error may not reoccur.</p> <h2 data-id="issue"><strong>ISSUE</strong></h2> <p></p> <div>Hyper-V backups fail with an error similar to: <br> </div> <div>GetWriterStatus: USNAPError! GatherWriterStatus call has returned a failure.<br>(VSS_E_WRITERERROR_RETRYABLE) The writer experienced a transient error. If the backup process is retried, the error may not reoccur.<br>Please check the Windows Event Log to ensure that Volume Shadow Copy Service and VSS Writers are operating properly. See also KB 000003650.<br>CreateVSSSnapshot: USNAPError! Writer has failed after PrepareBackup request.<br>Unitrends agent was not able to create Volume Shadow Copy.<br>To resolve this issue review the Event logs for any potential VSS errors and application specific Writer failures.</div> <div> </div> <h2 data-id="resolution"><strong>RESOLUTION</strong></h2> <p></p> <div>The (VSS_E_WRITERERROR_RETRYABLE) is generally caused by VSS in the Hyper-V host failing to create a snapshot. This in turn rolls out through Hyper-V integration services to VSS on the host and causes the Hyper-V writer to enter a failed state with the last error of retryable error. You can view details by typing "<i>vssadmin list writers</i>" at the command prompt of the host.<br> </div> <div>Writer name: 'Microsoft Hyper-V VSS Writer'<br> Writer Id: {66841cd4-6ded-4f4b-8f17-fd23f8ddc3de}<br> Writer Instance Id: {c35d6ab0-9588-412f-ae7b-cdc37534501f}<br> State: [8] Failed<br> Last error: Retryable error</div> <div> <br>VSS on the host will often remain in this state until the host is rebooted or the related services are restarted. To correct this issue without rebooting the host type "<i>net stop vmms</i>" and once that completes type "<i>net start vmms</i>". If the condition persists, consult Microsoft's documentation for VSS. </div> </article> </main>