IndexOutOfRangeException error without any reason

Unity Engine
,
1

Hi,please can someone tell me why this error happened, and what does it mean?

IndexOutOfRangeException: Index 23 is out of range of ‘23’ Length.
Unity.Collections.NativeArray1[T].FailOutOfRangeError (System.Int32 index) (at <94c5f4c38cdc42d2b006f8badef04394>:0) Unity.Collections.NativeArray1[T].CheckElementReadAccess (System.Int32 index) (at <94c5f4c38cdc42d2b006f8badef04394>:0)
Unity.Collections.NativeArray`1[T].get_Item (System.Int32 index) (at <94c5f4c38cdc42d2b006f8badef04394>:0)
Unity.Entities.Editor.EntityArrayListAdapter+Enumerator.UpdateIndexInChunk () (at Library/PackageCache/com.unity.entities@0.6.0-preview.24/Unity.Entities.Editor/EntityDebugger/EntityArrayListAdapter.cs:58)
Unity.Entities.Editor.EntityArrayListAdapter+Enumerator.MoveToIndex (System.Int32 newLinearIndex) (at Library/PackageCache/com.unity.entities@0.6.0-preview.24/Unity.Entities.Editor/EntityDebugger/EntityArrayListAdapter.cs:68)
Unity.Entities.Editor.EntityArrayListAdapter.get_Item (System.Int32 linearIndex) (at Library/PackageCache/com.unity.entities@0.6.0-preview.24/Unity.Entities.Editor/EntityDebugger/EntityArrayListAdapter.cs:132)
UnityEditor.IMGUI.Controls.TreeViewDataSource.GetItem (System.Int32 row) (at <9a184ab867bb42c296d20ace04f48df3>:0)
UnityEditor.IMGUI.Controls.TreeViewController.IterateVisibleItems (System.Int32 firstRow, System.Int32 numVisibleRows, System.Single rowWidth, System.Boolean hasFocus) (at <9a184ab867bb42c296d20ace04f48df3>:0)
UnityEditor.IMGUI.Controls.TreeViewController.OnGUI (UnityEngine.Rect rect, System.Int32 keyboardControlID) (at <9a184ab867bb42c296d20ace04f48df3>:0)
UnityEditor.IMGUI.Controls.TreeView.TreeViewWithMultiColumnHeader (UnityEngine.Rect rect) (at <9a184ab867bb42c296d20ace04f48df3>:0)
UnityEditor.IMGUI.Controls.TreeView.OnGUI (UnityEngine.Rect rect) (at <9a184ab867bb42c296d20ace04f48df3>:0)
Unity.Entities.Editor.EntityDebugger.EntityList () (at Library/PackageCache/com.unity.entities@0.6.0-preview.24/Unity.Entities.Editor/EntityDebugger/EntityDebugger.cs:487)
Unity.Entities.Editor.EntityDebugger.OnGUI () (at Library/PackageCache/com.unity.entities@0.6.0-preview.24/Unity.Entities.Editor/EntityDebugger/EntityDebugger.cs:567)
System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[ ] parameters, System.Globalization.CultureInfo culture) (at <437ba245d8404784b9fbab9b439ac908>:0)
Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation.
System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[ ] parameters, System.Globalization.CultureInfo culture) (at <437ba245d8404784b9fbab9b439ac908>:0)
System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[ ] parameters) (at <437ba245d8404784b9fbab9b439ac908>:0)
UnityEditor.HostView.Invoke (System.String methodName, System.Object obj) (at <9a184ab867bb42c296d20ace04f48df3>:0)
UnityEditor.HostView.Invoke (System.String methodName) (at <9a184ab867bb42c296d20ace04f48df3>:0)
UnityEditor.HostView.InvokeOnGUI (UnityEngine.Rect onGUIPosition, UnityEngine.Rect viewRect) (at <9a184ab867bb42c296d20ace04f48df3>:0)
UnityEditor.DockArea.DrawView (UnityEngine.Rect viewRect, UnityEngine.Rect dockAreaRect) (at <9a184ab867bb42c296d20ace04f48df3>:0)
UnityEditor.DockArea.OldOnGUI () (at <9a184ab867bb42c296d20ace04f48df3>:0)
UnityEngine.UIElements.IMGUIContainer.DoOnGUI (UnityEngine.Event evt, UnityEngine.Matrix4x4 parentTransform, UnityEngine.Rect clippingRect, System.Boolean isComputingLayout, UnityEngine.Rect layoutSize, System.Boolean canAffectFocus) (at <57fa7f4ad1c34ed185465e0a9f71c244>:0)
UnityEngine.UIElements.IMGUIContainer.HandleIMGUIEvent (UnityEngine.Event e, UnityEngine.Matrix4x4 worldTransform, UnityEngine.Rect clippingRect, System.Boolean canAffectFocus) (at <57fa7f4ad1c34ed185465e0a9f71c244>:0)
UnityEngine.UIElements.IMGUIContainer.HandleIMGUIEvent (UnityEngine.Event e, System.Boolean canAffectFocus) (at <57fa7f4ad1c34ed185465e0a9f71c244>:0)
UnityEngine.UIElements.IMGUIContainer.SendEventToIMGUI (UnityEngine.UIElements.EventBase evt, System.Boolean canAffectFocus) (at <57fa7f4ad1c34ed185465e0a9f71c244>:0)
UnityEngine.UIElements.IMGUIContainer.HandleEvent (UnityEngine.UIElements.EventBase evt) (at <57fa7f4ad1c34ed185465e0a9f71c244>:0)
UnityEngine.UIElements.EventDispatchUtilities.PropagateEvent (UnityEngine.UIElements.EventBase evt) (at <57fa7f4ad1c34ed185465e0a9f71c244>:0)
UnityEngine.UIElements.MouseEventDispatchingStrategy.DispatchEvent (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.IPanel panel) (at <57fa7f4ad1c34ed185465e0a9f71c244>:0)
UnityEngine.UIElements.EventDispatcher.ProcessEvent (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.IPanel panel) (at <57fa7f4ad1c34ed185465e0a9f71c244>:0)
UnityEngine.UIElements.EventDispatcher.ProcessEventQueue () (at <57fa7f4ad1c34ed185465e0a9f71c244>:0)
UnityEngine.UIElements.EventDispatcher.OpenGate () (at <57fa7f4ad1c34ed185465e0a9f71c244>:0)
UnityEngine.UIElements.EventDispatcherGate.Dispose () (at <57fa7f4ad1c34ed185465e0a9f71c244>:0)
UnityEngine.UIElements.EventDispatcher.ProcessEvent (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.IPanel panel) (at <57fa7f4ad1c34ed185465e0a9f71c244>:0)
UnityEngine.UIElements.EventDispatcher.Dispatch (UnityEngine.UIElements.EventBase evt, UnityEngine.UIElements.IPanel panel, UnityEngine.UIElements.DispatchMode dispatchMode) (at <57fa7f4ad1c34ed185465e0a9f71c244>:0)
UnityEngine.UIElements.BaseVisualElementPanel.SendEvent (UnityEngine.UIElements.EventBase e, UnityEngine.UIElements.DispatchMode dispatchMode) (at <57fa7f4ad1c34ed185465e0a9f71c244>:0)
UnityEngine.UIElements.UIElementsUtility.DoDispatch (UnityEngine.UIElements.BaseVisualElementPanel panel) (at <57fa7f4ad1c34ed185465e0a9f71c244>:0)
UnityEngine.UIElements.UIElementsUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr) (at <57fa7f4ad1c34ed185465e0a9f71c244>:0)
UnityEngine.GUIUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr) (at <59837000ebf54955a9cb1d31caa86097>:0)

2

Your NativeArray has 23 elements. The first one is 0 and the last one is 22. Array[23] would be the 24th element, which doesn’t exist.

1 Like
3

yes but i dont have a NativeArray with 23 elements,i don’t know why this error appears and it always says Index 23 is out of range of ‘23’ Length regardless of entities number in the scene

4

Does this error appear when EntityDebugger enabled with selected entity and you exit play mode? Because it’s entity debugger UI error which doesn’t affect any your gameplay logic.

1 Like
5

yes EntityDebugger enabled but the error appear during the play mode and there is no specific time, it just happens suddenly