Openstaad problems

Hi, I'm trying using excel vba to model but am having some problems. My staad pro ce is Version 22.01.00.38. Here are some tests which I followed from openSTAAD help.

TEST 1

Sub Test01()

    Dim objOpenSTAAD As Object
    Dim fCoordX As Double
    Dim fCoordY As Double
    Dim fCoordZ As Double
    Dim nNodeNo As Variant

    Set objOpenSTAAD = GetObject(, "StaadPro.OpenSTAAD")

    fCoordX = 3
    fCoordY = 2
    fCoordZ = 3

    nNodeNo = OSGeometryUI.AddNode(fCoordX, fCoordY, fCoordZ) -------> ERROR

    Set objOpenSTAAD = Nothing

End Sub

ERROR: Run-time error '424': Object required

TEST 2

Sub Test02()

    Dim objOpenSTAAD As Object
    Dim fCoordX As Double
    Dim fCoordY As Double
    Dim fCoordZ As Double

    Set objOpenSTAAD = GetObject(, "StaadPro.OpenSTAAD")

    fCoordX = 3
    fCoordY = 2
    fCoordZ = 3

    OSGeometryUI.CreateNode(10, fCoordX, fCoordY, fCoordZ)

    Set objOpenSTAAD = Nothing

End Sub

ERROR: Expected: =

TEST 3

Sub Test03()

Dim lNodeCount As Variant

lNodeCount = OSGeometryUI.GetNodeCount()
End Sub

ERROR: Run-time error '424': Object required

I noted there is a "void" in the front of the function title in openSTAAD help, what does this mean? Does it mean the function can't use anymore?