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While creating new VM I am trying to attach existing VHDX created earlier.

But this fails with following error.

Hyper-V encountered an error while configuring network on New Virtual Machine, because the object was not found.

I am already runnig Hyper-V as administrator & have verfied that VHD do exist. What could be the issue?

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I tried to post screenshot of the error but unable to do so, now. Will post it soon once I get 10 reputation here. – Abhijeet Sep 22 '12 at 9:28
up vote 0 down vote accepted

I found this problem myself while adding certain VHKD files to new and existing Hyper-V virtual machines, I never really dug around that much as I have experience loads of problems adding virtual hard disks to Hyper-V unless they were VHD format.

This is more of a work around than a solution, but it may help you; I downloaded this tool

Which is completely free! It allows you to take a VHKD and convert it to a VHD! It doesnt take that long either, I would imagine it would work after doing this.

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Hi Thaks for your answer, you mean to say the issue exists for VHDX and should be reslved once this is converted to VHD. – Abhijeet Sep 25 '12 at 9:33
I am not saying there is an 'official' issue with VHDX, but I have experienced issue's myself and have since came up with this work around. – bettsy583 Sep 25 '12 at 9:42

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