Hi am having an error too and would *also* like to what it means. It happens as soon as i enable the mod in the content manager.
System.Exception: A Mod caused an error ---> System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.NullReferenceException: Object reference not set to an instance of an object
at TreeAnarchy.TALocale.GetLocale (System.String name) [0x00000] in <filename unknown>:0
at TreeAnarchy.TAOptionPanel.ShowTreeAnarchyOptions (ColossalFramework.UI.UIPanel panel) [0x00000] in <filename unknown>:0
at TreeAnarchy.TAOptionPanel.SetupPanel (ColossalFramework.UI.UIPanel root) [0x00000] in <filename unknown>:0
at TreeAnarchy.TAMod.OnSettingsUI (UIHelperBase helper) [0x00000] in <filename unknown>:0
at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (object,object[],System.Exception+)
at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
--- End of inner exception stack trace ---
at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] in <filename unknown>:0
at OptionsMainPanel.AddUserMods () [0x00000] in <filename unknown>:0
--- End of inner exception stack trace ---

Originally posted by ACanadianRailfan:

Simulation error: Object reference not set to an instance of an object
at TreeAnarchy.Patches.TreeInstancePatches.PopulateGroupData (TreeInfo,UnityEngine.Vector3,single,single,UnityEngine.Vector4,int&,int&,UnityEngine.Vector3,RenderGroup/MeshData,UnityEngine.Vector3&,UnityEngine.Vector3&,single&,single&) <0x00081>
at (wrapper dynamic-method) TreeInstance.TreeInstance.PopulateGroupData_Patch0 (TreeInstance&,uint,int,int&,int&,UnityEngine.Vector3,RenderGroup/MeshData,UnityEngine.Vector3&,UnityEngine.Vector3&,single&,single&) <0x001d4>
at (wrapper dynamic-method) TreeManager.TreeManager.PopulateGroupData_Patch1 (TreeManager,int,int,int,int&,int&,UnityEngine.Vector3,RenderGroup/MeshData,UnityEngine.Vector3&,UnityEngine.Vector3&,single&,single&,bool&) <0x0017f>
at RenderManager.Managers_PopulateGroupData (int,int,int,int&,int&,UnityEngine.Vector3,RenderGroup/MeshData,UnityEngine.Vector3&,UnityEngine.Vector3&,single&,single&,bool&) <0x000b1>
at RenderGroup.UpdateMeshData (RenderGroup/MeshLayer,UnityEngine.Vector3&,UnityEngine.Vector3&) <0x00391>
at RenderGroup.UpdateMeshData () <0x00155>
at RenderManager.SimulationStepImpl (int) <0x00103>
at SimulationManagerBase`2.SimulationStep (int) <0x0004c>
at RenderManager.ISimulationManager.SimulationStep (int) <0x00024>
at SimulationManager.SimulationStep () <0x00693>
at SimulationManager.SimulationThread () <0x0018a>
[Core]

You probably didn't install Harmony correctly.

Originally posted by eggsmilwaukee:

Hi am having an error too and would *also* like to what it means. It happens as soon as i enable the mod in the content manager.
System.Exception: A Mod caused an error ---> System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.NullReferenceException: Object reference not set to an instance of an object
at TreeAnarchy.TALocale.GetLocale (System.String name) [0x00000] in <filename unknown>:0
at TreeAnarchy.TAOptionPanel.ShowTreeAnarchyOptions (ColossalFramework.UI.UIPanel panel) [0x00000] in <filename unknown>:0
at TreeAnarchy.TAOptionPanel.SetupPanel (ColossalFramework.UI.UIPanel root) [0x00000] in <filename unknown>:0
at TreeAnarchy.TAMod.OnSettingsUI (UIHelperBase helper) [0x00000] in <filename unknown>:0
at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (object,object[],System.Exception+)
at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
--- End of inner exception stack trace ---
at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] in <filename unknown>:0
at OptionsMainPanel.AddUserMods () [0x00000] in <filename unknown>:0
--- End of inner exception stack trace ---

Your localization setting is incorrect, which causes this issue. Please uninstall this mod and reinstall it again.