自从更新到 MonoDevelop 3.0.1 版后，我一直无法使用布局文件。当我创建一个新的布局文件，然后尝试从“源”选项卡中对其进行编辑时，我收到以下错误：
System.InvalidOperationException: Layout not yet loaded
at Xamarin.AndroidDesigner.DesignerSession.SetLayoutXml (System.String xml, Boolean allowUndo) [0x000bf] in /Users/builder/data/lanes/monodevelop-mac-3.0.1/6642975f/source/md-addins/MonoDevelop.MonoDroid/Xamarin.AndroidDesigner/Xamarin.AndroidDesigner/DesignerSession.cs:353
at MonoDevelop.MonoDroid.Gui.LayoutSourceEditorView.SaveContent () [0x00025] in /Users/builder/data/lanes/monodevelop-mac-3.0.1/6642975f/source/md-addins/MonoDevelop.MonoDroid/MonoDevelop.MonoDroid/Gui/AndroidDesignerView.cs:641
at MonoDevelop.MonoDroid.Gui.LayoutSourceEditorView.Deselected () [0x00000] in /Users/builder/data/lanes/monodevelop-mac-3.0.1/6642975f/source/md-addins/MonoDevelop.MonoDroid/MonoDevelop.MonoDroid/Gui/AndroidDesignerView.cs:670
at MonoDevelop.Ide.Gui.SdiWorkspaceWindow.SetCurrentView (Int32 newIndex) [0x00032] in /Users/builder/data/lanes/monodevelop-mac-3.0.1/6642975f/source/monodevelop/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Gui/SdiWorkspaceWindow.cs:571
at MonoDevelop.Ide.Gui.SdiWorkspaceWindow+<AddButton>c__AnonStoreyB0.<>m__169 (System.Object sender, System.EventArgs e) [0x00033] in /Users/builder/data/lanes/monodevelop-mac-3.0.1/6642975f/source/monodevelop/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Gui/SdiWorkspaceWindow.cs:488
at MonoDevelop.Components.Tab.OnActivated (System.EventArgs e) [0x0000d] in /Users/builder/data/lanes/monodevelop-mac-3.0.1/6642975f/source/monodevelop/main/src/core/MonoDevelop.Ide/MonoDevelop.Components/Tabstrip.cs:396
at MonoDevelop.Components.Tab.Activate () [0x00000] in /Users/builder/data/lanes/monodevelop-mac-3.0.1/6642975f/source/monodevelop/main/src/core/MonoDevelop.Ide/MonoDevelop.Components/Tabstrip.cs:244
at MonoDevelop.Ide.Gui.SdiWorkspaceWindow.ActiveDocumentChanged (System.Object sender, System.EventArgs e) [0x0000b] in /Users/builder/data/lanes/monodevelop-mac-3.0.1/6642975f/source/monodevelop/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Gui/SdiWorkspaceWindow.cs:501
at (wrapper delegate-invoke) <Module>:invoke_void__this___object_EventArgs (object,System.EventArgs)
at (wrapper delegate-invoke) <Module>:invoke_void__this___object_EventArgs (object,System.EventArgs)
at (wrapper delegate-invoke) <Module>:invoke_void__this___object_EventArgs (object,System.EventArgs)
at (wrapper delegate-invoke) <Module>:invoke_void__this___object_EventArgs (object,System.EventArgs)
at (wrapper delegate-invoke) <Module>:invoke_void__this___object_EventArgs (object,System.EventArgs)
at (wrapper delegate-invoke) <Module>:invoke_void__this___object_EventArgs (object,System.EventArgs)
at (wrapper delegate-invoke) <Module>:invoke_void__this___object_EventArgs (object,System.EventArgs)
at MonoDevelop.Ide.Gui.Workbench.OnDocumentChanged (System.Object s, System.EventArgs a) [0x0000b] in /Users/builder/data/lanes/monodevelop-mac-3.0.1/6642975f/source/monodevelop/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Gui/Workbench.cs:606
at MonoDevelop.Ide.Gui.DefaultWorkbench.OnActiveWindowChanged (System.Object sender, System.EventArgs e) [0x00075] in /Users/builder/data/lanes/monodevelop-mac-3.0.1/6642975f/source/monodevelop/main/src/core/MonoDevelop.Ide/MonoDevelop.Ide.Gui/DefaultWorkbench.cs:749
at Gtk.Notebook.SwitchPageSignalCallback (IntPtr arg0, IntPtr arg1, UInt32 arg2, IntPtr gch) [0x00000] in <filename unknown>:0
我还没有发现表明其他人正在经历这种情况的错误。这可能是我的环境中的某种配置问题吗？我正在为 Android 4.2.1.196198126 使用 Mono。