Unhandle exception in Log4View

After restart of Log4View the Logger, Filter, Search, and Message Panels could no longer be shown, had to reinstall Log4View to see them again!

System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
   at System.Collections.ArrayList.get_Item(Int32 index)
   at DevExpress.XtraBars.Docking.ReadOnlyPanelCollection.get_Item(Int32 index)
   at DevExpress.XtraBars.Docking.DockManager.CheckActivePanel()
   at DevExpress.XtraBars.Docking.DockManager.DeserializeLayoutManager()
   at DevExpress.XtraBars.Docking.DockManager.SafeOnLoaded()
   at DevExpress.XtraBars.Docking.DockManager.OnLoaded()
   at DevExpress.XtraBars.Docking.DockManager.DevExpress.Utils.Serializing.IXtraSerializable.OnEndDeserializing(String restoredVersion)
   at DevExpress.Utils.Serializing.Helpers.DeserializeHelper.RaiseEndDeserializing(Object obj, String restoredLayoutVersion)
   at DevExpress.Utils.Serializing.Helpers.DeserializeHelper.DeserializeObject(Object obj, IXtraPropertyCollection store, XtraSerializationFlags parentFlags, OptionsLayoutBase options)
   at DevExpress.Utils.Serializing.XtraSerializer.DeserializeObject(Object obj, IXtraPropertyCollection store, OptionsLayoutBase options)
   at DevExpress.Utils.Serializing.XtraSerializer.DeserializeObject(Object obj, String path, String appName, OptionsLayoutBase options)
   at DevExpress.XtraBars.Docking.DockManager.RestoreLayoutCore(XtraSerializer serializer, Object path)
   at DevExpress.XtraBars.Docking.DockManager.RestoreLayoutFromRegistry(String path)
   at Prosa.Log4View.Log4ViewCtrl.RestoreLayout()
   at Prosa.Log4View.ProgramForm.ProgramFormLoad(Object sender, EventArgs e)
   at System.Windows.Forms.Form.OnLoad(EventArgs e)
   at DevExpress.XtraEditors.XtraForm.OnLoad(EventArgs e)
   at System.Windows.Forms.Form.OnCreateControl()
   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   at System.Windows.Forms.Control.CreateControl()
   at System.Windows.Forms.Control.WmShowWindow(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at System.Windows.Forms.ContainerControl.WndProc(Message& m)
   at System.Windows.Forms.Form.WmShowWindow(Message& m)
   at System.Windows.Forms.Form.WndProc(Message& m)
   at DevExpress.XtraEditors.XtraForm.WndProc(Message& msg)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Dear Jens,

we are sorry to hear that. If this problem occurs again, could you please try deleting the key "Layout" at

HKEY_CURRENT_USER\Software\PROSA\Log4View\<Log4View Version>

in your registry? Also would you mind sending us the values there causing your problem before deleting them?

Thank you for your feedback

Philipp Lauchner
PROSA GmbH
Development & Support

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\PROSA\Log4View]
"installed"=dword:00000001
@="Desktop"

[HKEY_CURRENT_USER\Software\PROSA\Log4View\12.0.7]

[HKEY_CURRENT_USER\Software\PROSA\Log4View\12.0.7\Layout]

[HKEY_CURRENT_USER\Software\PROSA\Log4View\12.0.7\Layout\Log4ViewCtrl]
"X"=dword:fffffff8
"Y"=dword:fffffff8
"Width"=dword:00000790
"Height"=dword:00000498
"WindowState"=dword:00000002

[HKEY_CURRENT_USER\Software\PROSA\Log4View\12.3.7]

[HKEY_CURRENT_USER\Software\PROSA\Log4View\12.3.7\Layout]

[HKEY_CURRENT_USER\Software\PROSA\Log4View\12.3.7\Layout\Log4ViewCtrl]
"X"=dword:000001c3
"Y"=dword:0000008b
"Width"=dword:00000580
"Height"=dword:000002bd
"WindowState"=dword:00000000

[HKEY_CURRENT_USER\Software\PROSA\Log4View\Layout]

[HKEY_CURRENT_USER\Software\PROSA\Log4View\Layout\DockManagerData]
"#LayoutVersion"="9"
"AllowGlyphSkinning"="False"
"AutoHiddenPanelCaptionShowMode"="ShowForAllPanels"
"ActivePanelID"=dword:ffffffff

[HKEY_CURRENT_USER\Software\PROSA\Log4View\Layout\DockManagerData\AutoHideContainers]
@=dword:00000000

[HKEY_CURRENT_USER\Software\PROSA\Log4View\Layout\DockManagerData\DockingOptions]
"AutoHidePanelVerticalTextOrientation"="Default"
"CursorFloatCanceled"="~Xtra#NULL"
"HideImmediatelyOnAutoHide"="False"
"CloseActiveTabOnly"="True"
"CloseActiveFloatTabOnly"="False"
"ShowCaptionOnMouseHover"="False"
"ShowCaptionImage"="False"
"DockPanelInTabContainerTabRegion"="DockImmediately"
"DockPanelInCaptionRegion"="Default"
"ShowMaximizeButton"="True"
"ShowAutoHideButton"="True"
"ShowCloseButton"="True"
"FloatOnDblClick"="True"

[HKEY_CURRENT_USER\Software\PROSA\Log4View\Layout\DockManagerData\Panels]
@=dword:00000000

[HKEY_CURRENT_USER\Software\PROSA\Log4View\Layout\DockManagerData\TopZIndexControls]
@=dword:00000005
"Item1"="DevExpress.XtraBars.BarDockControl"
"Item2"="DevExpress.XtraBars.StandaloneBarDockControl"
"Item3"="System.Windows.Forms.StatusBar"
"Item4"="DevExpress.XtraBars.Ribbon.RibbonStatusBar"
"Item5"="DevExpress.XtraBars.Ribbon.RibbonControl"

Dear Jens,

there seems to be a problem with saving the layout to the registry, which causes these problems at startup of Log4View, when these values are read again. As the management (and thus saving/loading) of the layout is done by an external libary, we are unable to fix this problem on our own.
In the meantime, we added a workaround in our latest beta version (12.4.1) which should reset the layout to  default when this error is detected at startup.

Philipp Lauchner
PROSA GmbH
Development & Support