[vbox-dev] Problem with restoring a snapshot via API: Console is null

Klaus Espenlaub klaus.espenlaub at oracle.com
Thu Jul 3 14:41:31 GMT 2014


On 02.07.2014 15:52, Daniel Dreibrodt wrote:
> Hello,
> I’m developing a C# application that controls VMs, starts them, stops
> them and runs programs in them. It should also reset the VM to a
> previously saved snapshot.
> But I get a NullReferenceException because the Console object of my
> session is null, although I call LockMachine.
> Here is the code with which I try to reset the machine after it has been
> powered down.

The code looks fine... I wonder if this is some language binding 
specific problem. Not that it would make much sense, the call isn't 
doing anything complex like returning a safearray.

Your code is rather close to what VBoxManage does, so I'm puzzled.


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