Treeview Refresh - Strange Behavior

[kvrdeveloper1]

Hello all,

I am populating my treeview with only 1 level of items. Upon opening my
screen, I call the RefreshTreeview routine which populates the treeview just
fine, and I am able to click on nodes in the treeview and populate the
appropriate data accordingly. However, once I add a new record via this
screen and call the same RefreshTreeview routine (which successfully
populates the treeview with the appropriate items including the new one just
added) - the treeview gives me an error upon clicking any node: "Object
reference not set to an instance of an object.", when I am attempting to grab
the tvwROS.Selected Node.Text (just as I did before upon opening of the screen
which did not error)...

This is stumping me... please help!!! :)
-Valerie

Routine is below:
Private Sub RefreshTreeview ()

Dim sSQL As String
Dim rsRecordset As ADODB.Recordset
Dim iIndex As Integer
Dim sROSSystem As String
Dim lROSID As Long

'Clear Treeview
tvwROS.Nodes.Cl ear()
iIndex = -1

sSQL = "SELECT ROSID, ROSSystemDS FROM vwROS WHERE VisitID = " &
glVisitID
rsRecordset = gdcDataConnecti on.Execute(sSQL )

With rsRecordset
If Not (.BOF And .EOF) Then
While Not .EOF
iIndex = iIndex + 1
sROSSystem = rsRecordset("RO SSystemDS").Val ue
lROSID = rsRecordset("RO SID").Value
tvwROS.Nodes.Ad d(sROSSystem)
tvwROS.Nodes.It em(iIndex).Tag = lROSID
.MoveNext()
End While
.Close()
End If
End With

mbIsDirty = False
btnSave.Enabled = False

End Sub