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Activity 'Deleting snapshot' failed. internal error

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We've been receiving the above error for some time on one VM. The Backup Management Server is installed on a VM Host with Windows Server 2012 R2 and Hyper-V in use. The error is too ambiguous for me. Logs attached. Anyone have any ideas what is happening?

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Hello Brent,

The error-message is a generic one and doesn't point to a specific cause, investigation will require collecting more of diagnostic information. I'd recommend investigating the issue with the help of our support team. To localize the issue, I'd try backing up to a different storage\ try with an Agent installed within the guest OS of the affected VM\ check Windows Event logs for any errors or warnings related to volumes with Hyper-V VMs.