Product: Vinchin Backup & Recovery
Version: V9.0
KB Number: 200187
Last Modified: 2026-07-15 14:47:52
Question
When backing up SCP VMs, backup jobs is stuck and later failed with error #31 Receive message timeout
Answer
Agentless backup ports need to be opened on HCI to ensure the data can be transfered normally.
Solution
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Go to System>Port Management page on HCI Web GUI.
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Enable Agentless backup data transfer service
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Run the backup job again on vinchin
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