Move component

When i try to use the code below to move or copy a component in an assembly,i will get an error message :
"Some or all selected objects were not transformed. Review limitations and check input."
Does anyone know what i did wrong?
Thank you!

Imports NXOpen
Public Class MyProgram
    Public Shared Sub Main()
        Dim theSession As Session = Session.GetSession()
        Dim lw As ListingWindow = theSession.ListingWindow
        Dim selectedobj = Snap.UI.Selection.SelectObject("Select")
        selectedobj.AllowMultiple = True
        selectedobj.Title = "Select components"
        Dim selectcom, trans As Snap.NX.Component
        Dim result As Snap.UI.Selection.Result = selectedobj.Show()
        If result.Response <> Snap.UI.Response.Cancel AndAlso result.Response <> Snap.UI.Response.Back Then
            Dim p = Snap.UI.Input.GetPosition("", "").Position
            If IsNothing(p) = False Then
                Dim isCopy = Snap.UI.Input.GetChoice({"Move", "Copy"}, "", "", "", Snap.UI.Block.EnumPresentationStyle.RadioBox)
                Dim isCopyBool = CBool(isCopy)
                Dim xform As Snap.Geom.Transform = Snap.Geom.Transform.CreateTranslation(p.X, p.Y, p.Z)
                'For Each obj As Snap.NX.NXObject In result.Objects
                '    Try
                '        If isCopyBool Then
                '            selectcom = CType(obj, Snap.NX.Component)
                '            trans = selectcom.Copy(xform)
                '        Else
                '            selectcom = CType(obj, Snap.NX.Component)
                '            selectcom.Move(xform)
                '        End If
                '    Catch ex As Exception
                '        lw.WriteLine(ex.Message)
                '    End Try
                '    Next
                    selectcom = CType(result.Objects(0), Snap.NX.Component)
                    trans = selectcom.Copy(xform)
                Catch ex As Exception
                End Try
            End If
        End If
    End Sub
End Class