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Fixed for 2022.2.X: Improve error message when saving out side of project
Fixed for 2021.3.X: Improve error message when saving outside of project
When trying to save from the UI builder outside of the project directory this exception will happen and nothing else gets reported to the user. I think it would be great if the error message could be improved.
NullReferenceException: Object reference not set to an instance of an object Unity.UI.Builder.VisualTreeAssetExtensions.DeepOverwrite (UnityEngine.UIElements.VisualTreeAsset vta, UnityEngine.UIElements.VisualTreeAsset other) (at C:/code/unity_trunk/External/MirroredPackageSources/com.unity.ui.builder/Editor/Utilities/VisualTreeAssetExtensions/VisualTreeAssetExtensions.cs:44) Unity.UI.Builder.BuilderDocumentOpenUXML.PostSaveToDiskChecksAndFixes (System.String newUxmlPath, System.Boolean needsFullRefresh) (at C:/code/unity_trunk/External/MirroredPackageSources/com.unity.ui.builder/Editor/Builder/Document/BuilderDocumentOpenUXML.cs:1019) Unity.UI.Builder.BuilderDocumentOpenUXML.SaveNewDocument (UnityEngine.UIElements.VisualElement documentRootElement, System.Boolean isSaveAs, System.Boolean& needsFullRefresh, System.String manualUxmlPath) (at C:/code/unity_trunk/External/MirroredPackageSources/com.unity.ui.builder/Editor/Builder/Document/BuilderDocumentOpenUXML.cs:466) Unity.UI.Builder.BuilderDocument.SaveNewDocument (UnityEngine.UIElements.VisualElement documentRootElement, System.Boolean isSaveAs, System.Boolean& needsFullRefresh, System.String manualUxmlPath) (at C:/code/unity_trunk/External/MirroredPackageSources/com.unity.ui.builder/Editor/Builder/Document/BuilderDocument.cs:272) Unity.UI.Builder.BuilderToolbar.SaveDocument (System.Boolean isSaveAs) (at C:/code/unity_trunk/External/MirroredPackageSources/com.unity.ui.builder/Editor/Builder/Toolbar/BuilderToolbar.cs:376) Unity.UI.Builder.BuilderToolbar.<SetUpFileMenu>b__45_5 (UnityEngine.UIElements.DropdownMenuAction a) (at C:/code/unity_trunk/External/MirroredPackageSources/com.unity.ui.builder/Editor/Builder/Toolbar/BuilderToolbar.cs:508) UnityEngine.UIElements.DropdownMenuAction.Execute () (at C:/code/unity_trunk/ModuleOverrides/com.unity.ui/Core/DropdownMenu.cs:189) UnityEditor.UIElements.EditorMenuExtensions+<>c__DisplayClass0_0.<PrepareMenu>b__0 () (at C:/code/unity_trunk/Editor/Mono/UIElements/EditorMenuExtensions.cs:35) UnityEditor.GenericMenu.CatchMenu (System.Object userData, System.String[] options, System.Int32 selected) (at C:/code/unity_trunk/Editor/Mono/GUI/GenericMenu.cs:127)
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