Great to know! Thank you for the heads up! Is there anything else that we can do for you? Thanks. The aim I had was to run a hyper-V Windows Server 2012 disk under Virtualbox. After I had converted the VHDX file to a vmdk file I was trying to run that in Virtual box. following a recipe I found here...

Looks like it is working now, running V2V-Converter natively on the same platform (Server 2012, vhdx).

I'm new to this forum. Came across this post while searching the web after a file info I got: "Error opening VHDX file. VHDX format supported on Windows 8 and later". This happened while I was trying to run V2Vtool on a Windows 7 machine on a vhdx-file (a Hyper-V virtual machine file). Doe...