I have a recordset that I loop thru adding nodes to my treeview.

Well at around record # 123 out of 500 or so, I get this error adding child node :

"Specified argument was out of the range of valid values.
Parameter name: Index was out of range.  Must be non-negative and less than the size of the collection."

 The node I'm adding to exists, and I can't see anything wrong w/ the data -  and it always gets hung up on the same record.

*And the same code has been used 122 times already w/out issue. *

Any ideas ?  my code:

 'lastDivisionIndex = 1

'lastOfficeIndex = 1.0

 Found the problem.

 I was using "item.GetNodeIndex" to get the lastIndex, and its returning a String with a float value - whereas the Index in Nodes collections takes an integer.

So something like 0.1 will always be 0, and was screwing everything up.

I'm now keeping tracking of the node Index with an actual Integer, and voila it works -  I guess this is a bug  ?

 Here's working code:

Dim item As TreeNode = New TreeNode
        item.Text = dr("office_name")
        item.NodeData = dr("office_id")
        tv1.Nodes(lastDivisionIndex).Nodes.Add(item)
        'lastOfficeIndex = item.GetNodeIndex   'should return Integer, bug ?
        lastOfficeIndex += 1    ' keep manual track of Index w/ local Integer variable
        lastOfficeID = dr("office_id")
        item = Nothing