使用WMI在HyperV VM上应用最新快照时，获得错误32775

Question

当我尝试使用WMI将VM还原为最新快照时，我会不断获得错误32775（此操作的无效状态）。我正在使用以下代码（顺便说明MSDN网站上提供）：

ManagementObject virtualSystemService = Utility.GetServiceObject(connectionScope,"Msvm_VirtualSystemManagementService");
ManagementBaseObject inParams =virtualSystemService.GetMethodParameters("ApplyVirtualSystemSnapshot");
ManagementObject vmSnapshot = GetLastVirtualSystemSnapshot(vm);
if (vmSnapshot != null)
{
    inParams["SnapshotSettingData"] = vmSnapshot.Path.Path;
    inParams["ComputerSystem"] = vm.Path.Path;
    ManagementBaseObject outParams = virtualSystemService.InvokeMethod("ApplyVirtualSystemSnapshot", inParams, null);
    if ((UInt32)outParams["ReturnValue"] == ReturnCode.Started)
    {
        if (Utility.JobCompleted(outParams, connectionScope))
        {
            Console.WriteLine("Snapshot was applied successfully.");
        }
        else
        {
            Console.WriteLine("Failed to apply snapshot.");
        }
    }
    else if ((UInt32)outParams["ReturnValue"] == ReturnCode.Completed)
    {
        Console.WriteLine("Snapshot was applied successfully.");
    }
    else
    {
        Console.WriteLine("Apply virtual system snapshot failed with error {0}", outParams["ReturnValue"]);
    }
}
else
{
    Console.WriteLine("No Snapshots!");
}

我可以毫无问题地在UI上应用快照，并且我的VM处于启用状态，并且没有做任何事情。OS是Windows2012。我还可以打印快照和VM的名称，因此识别机器和快照没有问题。

有什么想法吗？谢谢，Shahab

Answer 1

发现了问题，显然，如果要远程应用快照，则需要关闭VM！也许在MSDN网站上很难提及这一点。