Canvas Draw Errors on Initial Import

[hexbit_jackParticipant]

Upon first importing Node Canvas into a Unity project, attaching an FSMOwner component to an object, and creating a new graph (prompting the canvas tab to open), I receive the following error multiple times in my console:

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NullReferenceException: Object reference not set to an instance of an object NodeCanvas.Editor.CanvasStyles.get_canvasBG () (at Assets/ParadoxNotion/NodeCanvas/Framework/Design/PartialEditor/CanvasStyles.cs:97) NodeCanvas.Editor.GraphEditor.OnGUI () (at Assets/ParadoxNotion/NodeCanvas/Framework/Design/Editor/Windows/GraphEditor.cs:464) System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:222) Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation. System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:232) System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MethodBase.cs:115) UnityEditor.HostView.Invoke (System.String methodName, System.Object obj) (at C:/buildslave/unity/build/Editor/Mono/HostView.cs:295) UnityEditor.HostView.Invoke (System.String methodName) (at C:/buildslave/unity/build/Editor/Mono/HostView.cs:288) UnityEditor.HostView.InvokeOnGUI (Rect onGUIPosition) (at C:/buildslave/unity/build/Editor/Mono/HostView.cs:255)

And the canvas tab is empty (just a gray box). It seems like something isn’t initializing properly because the work around I’ve found is to save and close the project and then re-open it.

After re-opening, I can go to the canvas tab and select the object with the FSMOwner component and the graph renders in the canvas as expected.

[GavalakisKeymaster]

Hello,

Indeed this is a problem that might occur the first time you import the package. Simply restarting Unity once after the first import solves this, but this is of course something that I want to fix in the future.

Thank you!

[Author]

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