Autostart Manager Reconfiguration failed

When configuring Autostart Options for a virtual machine the virtual machine is not found.

def set_host_autostart(host, vm):

defaults = { 'start_delay': 120, 'stop_delay': 65535, 'start_action': 'powerOn', 'stop_action': 'GuestShutdown' }
asm = host.configManager.autoStartManager

asm_spec = vim.host.AutoStartManager.Config()
asm_spec.defaults = vim.host.AutoStartManager.SystemDefaults(enabled=True, startDelay=defaults['start_delay'],
                                                                           stopDelay=defaults['stop_delay'],
                                                                           stopAction=defaults['stop_action'])

power_info = vim.host.AutoStartManager.AutoPowerInfo(key=vm,
                                                     waitForHeartbeat=vim.host.AutoStartManager.AutoPowerInfo.WaitHeartbeatSetting.systemDefault,
                                                            startOrder=1,
                                                            startDelay=defaults['start_delay'],
                                                            stopDelay=defaults['stop_delay'],
                                                            startAction=defaults['start_action'],
                                                            stopAction=defaults['stop_action'])
asm_spec.powerInfo = [power_info]

print asm_spec

asm.ReconfigureAutostart(asm_spec)

print asm_spec:

(vim.host.AutoStartManager.Config) {
   dynamicType = <unset>,
   dynamicProperty = (vmodl.DynamicProperty) [],
   defaults = (vim.host.AutoStartManager.SystemDefaults) {
      dynamicType = <unset>,
      dynamicProperty = (vmodl.DynamicProperty) [],
      enabled = true,
      startDelay = 120,
      stopDelay = 65535,
      waitForHeartbeat = <unset>,
      stopAction = 'GuestShutdown'
   },
   powerInfo = (vim.host.AutoStartManager.AutoPowerInfo) [
      (vim.host.AutoStartManager.AutoPowerInfo) {
         dynamicType = <unset>,
         dynamicProperty = (vmodl.DynamicProperty) [],
         key = 'vim.VirtualMachine:vm-182',
         startOrder = 1,
         startDelay = 120,
         waitForHeartbeat = 'systemDefault',
         startAction = 'powerOn',
         stopDelay = 65535,
         stopAction = 'GuestShutdown'
      }
   ]
}

Raised Error:

Traceback (most recent call last):
  File "./create_vm.py", line 346, in <module>
    main()
  File "./create_vm.py", line 341, in main
    set_host_autostart(host, vm)
  File "./create_vm.py", line 176, in set_host_autostart
    asm.ReconfigureAutostart(asm_spec)
  File "build/bdist.linux-x86_64/egg/pyVmomi/VmomiSupport.py", line 566, in <lambda>
  File "build/bdist.linux-x86_64/egg/pyVmomi/VmomiSupport.py", line 375, in _InvokeMethod
  File "build/bdist.linux-x86_64/egg/pyVmomi/SoapAdapter.py", line 1300, in InvokeMethod
pyVmomi.VmomiSupport.ManagedObjectNotFound: (vmodl.fault.ManagedObjectNotFound) {
   dynamicType = <unset>,
   dynamicProperty = (vmodl.DynamicProperty) [],
   msg = 'The object has already been deleted or has not been completely created',
   faultCause = <unset>,
   faultMessage = (vmodl.LocalizableMessage) [],
   obj = 'vim.VirtualMachine:vm-2'
}

Start with the set_host_autostart function in create_vm.py and inspect how the vm argument is obtained before asm.ReconfigureAutostart is called. Compare that object with the AutoPowerInfo key and vSphere API expectations; the issue is done when a valid virtual machine can be configured without ManagedObjectNotFound.