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Drf.AskCustomSymbolLeader_funktioniert_nicht.zip

Hallo,

mit Hilfe der Funktion

Drf.AskCustomSymbolLeader (...)

möchte ich auf die Eigenschaften eines CustomSymbol- Leaders
zugreifen.

Doch leider erhalte ich vom Compiler nur die Meldung,
"System.NullReferenceException....", also sinngemäß, das Objekt
existiert nicht im Speicher.

Hier der Code:
' NX 3.0.4.2

Imports System
Imports System.IO
Imports NXOpen
Imports NXOpen.Annotations
Imports NXOpen.Drawings
Imports NXOpen.UF
Imports NXOpen.UI

Module ChangeLeader

Dim theSession As Session = Session.GetSession()
Dim theUFSession As UFSession = UFSession.GetUFSession()


Sub Main()

Dim listingWindow As NXOpen.ListingWindow
    Dim ui as UI = ui.GetUI
       
      Dim message as String = "Select WeldSymbol"
      Dim title as String = "Selection"
        Dim scope as Selection.SelectionScope = Selection.SelectionScope.WorkPart
        Dim keepHighlighted as Boolean = False
        Dim includeFeatures as Boolean = True
        Dim selectionAction as Selection.SelectionAction = _
        Selection.SelectionAction.ClearAndEnableSpecific

Dim SelectionType as Selection.SelectionType = 0
        Dim selectedObject As NXObject
        Dim cursor As Point3d
     
      'Selection Dialog
    ui.SelectionManager.SelectObject(message, _
    title, _
    scope, _
                                      includeFeatures, _
                                        keepHighlighted, _
                                        selectedObject, _
                                        cursor)
   
    Dim SelectedCustomSymbol As NXOpen.Annotations.CustomSymbol
SelectedCustomSymbol = CType(selectedObject, NXOpen.Annotations.CustomSymbol)


'Read angel
Dim Angle as Double
theUFSession.Drf.AskCustomSymbolAngle(SelectedCustomSymbol.Tag, Angle)


Dim LeaderPara() as NXOpen.UF.UFDrf.LeaderData
theUFSession.Drf.AskCustomSymbolLeader(SelectedCustomSymbol.Tag, LeaderPara)

'****************************** Error- Message: System.NullRefernceException

End Sub

End Module

Hat jemand von euch eine Idee? Das Test-Prt liegt bei.

Gruss Margo

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