06 Error Code: [72:106] Description: Error creating virtual machine [ServerName] snapshot. Please check Virtual Machine snapshot tree
Error Code: [72:106] Description: Error creating virtual machine [ServerName] snapshot. Please check Virtual Machine snapshot tree and the hosting volume for free space. Disable any pass through disk(s) attached to VM and try creating snapshot/checkpoint manually. Source: ServerName, Process: vsbkp
Solution
Cleaned up disk shadows to free up disk space on hosting volume. Hyper V VM backups completed successfully.