I need some help with this issue i am encountering.

I am trying to convert a Windows Server 2012 R2, from VMware ESXi 5.5 to Hyper V 2012 R2, the 5nine software downloads the harddrive and starts the convert of the disk, but suddenly i get this error: "The directory is not empty"

the logfile dosent get any more specific then this, have is there any help to get?