Tracking Charuco Board not possible

[juliasser]

When I try to open the "TrackMarkers" Scene, add an Empty and add the ArucoCharucoBoard Script plus Aruco Object Displayer and also add it to the ArucoObjects in the ArucoObjectTracker, then I get the following two error messages:

ApplicationException: Mutex is not owned
System.Threading.Mutex.ReleaseMutex () (at <695d1cc93cca45069c528c15c9fdd749>:0)
(wrapper remoting-invoke-with-check) System.Threading.Mutex.ReleaseMutex()
ArucoUnity.Utilities.ArucoCameraSeparateThread.b__25_0 () (at Assets/ArucoUnity/Scripts/Utilities/ArucoCameraSeparateThread.cs:93)
System.Threading.ThreadHelper.ThreadStart_Context (System.Object state) (at <695d1cc93cca45069c528c15c9fdd749>:0)
System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) (at <695d1cc93cca45069c528c15c9fdd749>:0)
System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) (at <695d1cc93cca45069c528c15c9fdd749>:0)
System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state) (at <695d1cc93cca45069c528c15c9fdd749>:0)
System.Threading.ThreadHelper.ThreadStart () (at <695d1cc93cca45069c528c15c9fdd749>:0)
UnityEngine.<>c:b__0_0(Object, UnhandledExceptionEventArgs)

NullReferenceException: Object reference not set to an instance of an object
ArucoUnity.Objects.Trackers.ArucoObjectsTracker.ArucoCamera_ImagesUpdated () (at Assets/ArucoUnity/Scripts/Objects/Trackers/ArucoObjectsTracker.cs:315)
ArucoUnity.Cameras.ArucoCamera.OnImagesUpdated () (at Assets/ArucoUnity/Scripts/Cameras/ArucoCamera.cs:177)
ArucoUnity.Cameras.ArucoCamera.Update () (at Assets/ArucoUnity/Scripts/Cameras/ArucoCamera.cs:67)

Is tracking a Charuco Board not supported?

Thanks!

[egemenertugrul]

Some discrepancies between the code on GitHub and the .unitypackage cause this.

This line:
if (arucoCharucoBoard.DetectedIds.Size() > 0)
should be:
if (arucoCharucoBoard.DetectedIds != null && arucoCharucoBoard.DetectedIds.Size() > 0)

as seen here.