Microsoft Hyper-V • Re: Backup with error "Error: Failed to call RPC function 'FcWriteFileEx': An unexpected network error occurred"

Hi Dric_IT,

Please open a Support Case and let Veeam Support review the behavior please. Be sure to include logs for the affected job for Support to review.

The issue at face value looks like generic SMB connectivity issue, but given that it's error-ing out on updating the VBM file (backup metadata), it's possible there are other factors that may lead to the error (e.g., firewall, AV on gateway)

It's best to start with a support case however as Support can review the behavior in the logs and give more specific answers as to the root cause.

Please share your case number once created. Thanks!

Statistics: Posted by david.domask — Jul 01, 2025 3:07 pm

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