Backup of a virtual machine using the Agent for VMware Virtual Infrastructure (AVVI) completes with the following exception when GRT is enabled: "V-79-57344-38721- Failed to mount one or more virtual disk images"

hi guys,

i got the error message for all vm's in daily backup,monthly and weekly no errors

there are no dynamic disk, no GPT, but one has few unfformated disks - could that  be the problem ?

plus could be the problem that the System Reserved 100MB partition that has not a drive letter assigned cause the issue ?

thank you !