Hi, Georgi, thank you wor your reply.

As I described in my post I already used the SaveComponentSettings() but failed. with the specified error. 

Also from the error message above we can see the Infragistics version 6.3... I suppose in the classical variant of a toolbar the serialization works, but if I have some images (handlers) or other kind of "non-standard" toolbars options, the serialization fails. 

What will be great that even some elements (like some images buttons or stuff) can't be serialized, at least other elements be serialized, but not if one element fails to be serialized, all others fails too... is not very good.

OK, I understand. We will think to switch to the latest version, but actually this request perhaps some money and specially time to reintroduce the new controls into the old code that I suppose should not be 100% compatible between 6 and 12 versions.

As for now, is there a known way to reposition the toolbars in a specified order?

Have a look on this:

  Private Sub SaveToolbarSettings()

    Dim toolbars As New SerializableDictionary(Of String, 
       ToolbarUserSettings)

    Dim theManager As UltraToolbarsManager = Me._ToolbarsManager

    For Each tbar As UltraToolbar In theManager.Toolbars

      Dim settings As New ToolbarUserSettings

      settings.IsMainMenuBar = tbar.IsMainMenuBar

      settings.IsStockToolbar = tbar.IsStockToolbar

      settings.ShowInToolbarList = tbar.ShowInToolbarList

      settings.Visible = tbar.Visible

      settings.DockedPosition = tbar.DockedPosition

      settings.DockedRow = tbar.DockedRow

      settings.DockedColumn = tbar.DockedColumn

      settings.FloatingLocation = tbar.FloatingLocation

      settings.FloatingSize = tbar.FloatingSize

      toolbars.Add(tbar.Key, settings)

    Next tbar

    toolbars.SerializeToFile("myToolbarSettingsFile.xml")

  End Sub

I save and restore the toolbars positions in the same order. 

This works good, but only for floatting toolbars, the others are re-arranged in strange way, the dimensions and tools behaves strange...

Is there a specific order in that I should restore the toolbar's positions, or other settings that I missed?

I just need to restore the position of the toolbars on the form, any other settings are not required.

This is how I restore: 

  Private Sub LoadToolbarSettings()

    Dim toolbars As SerializableDictionary(Of String,
                              ToolbarUserSettings)

    Try

      Dim fileName As String = "myToolbarSettingsFile.xml"

      toolbars = DeserializeFromFile(Of 
SerializableDictionary(Of 
String, ToolbarUserSettings))(fileName)

    Catch ex As Exception

      ' nothing to do, let the form load as usual

      Return

    End Try

    Dim theManager As UltraToolbarsManager = Me._ToolbarsManager

    For Each tbar As UltraToolbar In theManager.Toolbars

      If toolbars.ContainsKey(tbar.Key) Then

        Dim settings As ToolbarUserSettings = toolbars(tbar.Key)

        tbar.IsMainMenuBar = settings.IsMainMenuBar

        tbar.IsStockToolbar = settings.IsStockToolbar

        tbar.ShowInToolbarList = settings.ShowInToolbarList

        tbar.Visible = settings.Visible

        tbar.DockedPosition = settings.DockedPosition

        tbar.DockedRow = settings.DockedRow

        tbar.DockedColumn = settings.DockedColumn

        tbar.FloatingLocation = settings.FloatingLocation

        tbar.FloatingSize = settings.FloatingSize

      End If

    Next tbar

  End Sub

 This is the ToolbarUserSettings structure:

  <Serializable()> Public Structure ToolbarUserSettings
    Dim DockedColumn As Integer
    Dim DockedPosition As DockedPosition
    Dim DockedRow As Integer
    Dim FloatingLocation As Point
    Dim FloatingSize As Size
    Dim IsMainMenuBar As Boolean
    Dim IsStockToolbar As Boolean
    Dim ShowInToolbarList As Boolean
    Dim Visible As Boolean
  End Structure

Hello Serhiol,

This is very complicated task, because it depend of different settings of your UltraToolbarManager. The best option for you could be to upgrade your solution with our latest available version.

Let me know if you have any further questions.

Regards