Issue with MRTK

Question

Wondering if anybody else has run into this issue. I'm working on a HoloLens application using Unity 2019.4 and Microsoft's MRTK 2.7.2. I get the following messages when running on the device:

Loading native plugins
  Loading MicStreamSelector.dll
  Loading Microsoft.MixedReality.SceneUnderstanding.dll
  Loading pdfrenderer.dll
  Loading GpuStats.dll
  Loading AudioPluginMicrosoftSpatializer.dll
  Loading AudioPluginMsHRTF.dll
  Loading PlaneFinding.dll
  Loading Microsoft.MixedReality.Input.dll
Plugins: Failed to load 'Microsoft.MixedReality.Input' because one or more of its dependencies could not be loaded. 
(Filename: C:\buildslave\unity\build\Runtime/Misc/Plugins.cpp Line: 247)

Plugins: 2nd attempt to load module with '.dll' extension manually appended ('Microsoft.MixedReality.Input.dll') also couldn't be found (or it's dependencies). 
(Filename: C:\buildslave\unity\build\Runtime/Misc/Plugins.cpp Line: 253)

Shortly after those messages, I get an exception, which seems to be related, as it contains a bunch of stuff about Microsoft.MixedReality.Input:

COMException
  at System.Runtime.InteropServices.Marshal.ThrowExceptionForHR (System.Int32 errorCode) [0x00000] in <00000000000000000000000000000000>:0 
  at WinRT.WinrtModule.GetActivationFactory (WinRT.HString runtimeClassId) [0x00000] in <00000000000000000000000000000000>:0 
  at WinRT.ActivationFactory`1[T]..ctor () [0x00000] in <00000000000000000000000000000000>:0 
  at System.Reflection.MonoCMethod.InternalInvoke (System.Object obj, System.Object[] parameters) [0x00000] in <00000000000000000000000000000000>:0 
  at System.RuntimeType.CreateInstanceMono (System.Boolean nonPublic) [0x00000] in <00000000000000000000000000000000>:0 
  at System.RuntimeType.CreateInstanceDefaultCtor (System.Boolean publicOnly, System.Boolean skipCheckThis, System.Boolean fillCache, System.Threading.StackCrawlMark& stackMark) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Activator.CreateInstance[T] () [0x00000] in <00000000000000000000000000000000>:0 
  at WinRT.WeakLazy`1+<>c[T].<.ctor>b__2_0 () [0x00000] in <00000000000000000000000000000000>:0 
  at System.Func`1[TResult].Invoke () [0x00000] in <00000000000000000000000000000000>:0 
  at WinRT.WeakLazy`1[T].get_Value () [0x00000] in <00000000000000000000000000000000>:0 
  at WinRT.ActivationFactory`1[T].ActivateInstance[I] () [0x00000] in <00000000000000000000000000000000>:0 
  at Microsoft.MixedReality.Input.MotionControllerWatcher..ctor () [0x00000] in <00000000000000000000000000000000>:0 
  at Microsoft.MixedReality.Toolkit.WindowsMixedReality.Input.WindowsMixedRealityDeviceManager.Enable () [0x00000] in <00000000000000000000000000000000>:0 
  at Microsoft.MixedReality.Toolkit.BaseDataProviderAccessCoreSystem.Enable () [0x00000] in <00000000000000000000000000000000>:0 
  at Microsoft.MixedReality.Toolkit.Input.MixedRealityInputSystem.Enable () [0x00000] in <00000000000000000000000000000000>:0 
  at Microsoft.MixedReality.Toolkit.MixedRealityToolkit+<>c.<EnableAllServices>b__70_0 (Microsoft.MixedReality.Toolkit.IMixedRealityService service) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Action`1[T].Invoke (T obj) [0x00000] in <00000000000000000000000000000000>:0 
  at Microsoft.MixedReality.Toolkit.MixedRealityToolkit.ExecuteOnAllServicesInOrder (System.Action`1[T] execute) [0x00000] in <00000000000000000000000000000000>:0 
  at Microsoft.MixedReality.Toolkit.MixedRealityToolkit.EnableAllServices () [0x00000] in <00000000000000000000000000000000>:0 
Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation.
  at System.Reflection.MonoCMethod.InternalInvoke (System.Object obj, System.Object[] parameters) [0x00000] in <00000000000000000000000000000000>:0 
  at System.RuntimeType.CreateInstanceMono (System.Boolean nonPublic) [0x00000] in <00000000000000000000000000000000>:0 
  at System.RuntimeType.CreateInstanceDefaultCtor (System.Boolean publicOnly, System.Boolean skipCheckThis, System.Boolean fillCache, System.Threading.StackCrawlMark& stackMark) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Activator.CreateInstance[T] () [0x00000] in <00000000000000000000000000000000>:0 
  at WinRT.WeakLazy`1+<>c[T].<.ctor>b__2_0 () [0x00000] in <00000000000000000000000000000000>:0 
  at System.Func`1[TResult].Invoke () [0x00000] in <00000000000000000000000000000000>:0 
  at WinRT.WeakLazy`1[T].get_Value () [0x00000] in <00000000000000000000000000000000>:0 
  at WinRT.ActivationFactory`1[T].ActivateInstance[I] () [0x00000] in <00000000000000000000000000000000>:0 
  at Microsoft.MixedReality.Input.MotionControllerWatcher..ctor () [0x00000] in <00000000000000000000000000000000>:0 
  at Microsoft.MixedReality.Toolkit.WindowsMixedReality.Input.WindowsMixedRealityDeviceManager.Enable () [0x00000] in <00000000000000000000000000000000>:0 
  at Microsoft.MixedReality.Toolkit.BaseDataProviderAccessCoreSystem.Enable () [0x00000] in <00000000000000000000000000000000>:0 
  at Microsoft.MixedReality.Toolkit.Input.MixedRealityInputSystem.Enable () [0x00000] in <00000000000000000000000000000000>:0 
  at Microsoft.MixedReality.Toolkit.MixedRealityToolkit+<>c.<EnableAllServices>b__70_0 (Microsoft.MixedReality.Toolkit.IMixedRealityService service) [0x00000] in <00000000000000000000000000000000>:0 
  at System.Action`1[T].Invoke (T obj) [0x00000] in <00000000000000000000000000000000>:0 
  at Microsoft.MixedReality.Toolkit.MixedRealityToolkit.ExecuteOnAllServicesInOrder (System.Action`1[T] execute) [0x00000] in <00000000000000000000000000000000>:0 
  at Microsoft.MixedReality.Toolkit.MixedRealityToolkit.EnableAllServices () [0x00000] in <00000000000000000000000000000000>:0

Anybody have any clue as to why Microsoft.MixedReality.Input.dll will not load? Any idea what dependency might be missing? Where would I find a list of the dependencies?

Thanks for any help.

Could you provide more information about your developing environment? Such as the Project Setting and Build Setting of Unity, and the Building Property of Visual Studio. Generally wondering if there's a consistent way to reproduce this. — Hernando - MSFT, Aug 30 '21 at 05:44
FYI I did get this resolved a while back, can't even remember the specific details, but there was some package I was missing. But thanks for the response anyway. — Dave L, Oct 08 '21 at 20:33

Issue with MRTK

0 Answers0