"There are no partitions on selected disk" when try to recover file from restored disk

Hi guys!

I have Data Protector v. 7.0 and i've installed Granular Recovery Extension on my vmware sphere 5.1, so when i try to recover some file from a virtual disk I restored it appears a message that says "There are no partitions on selected disk". The virtual disk was restored on a NFS and the virtual machine has a Red Hat 6 SO.

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Thanks!