InfoPath Dev

I will try to convey this so it makes sense to someone besides me. I have a webservice that populates a repeating table. The repeating table could have up to 70 diferent rows.  Each row will have three % fields (c, d, and e - below).  I need for each of the Sales and GP totals to be calucluated by row based on the user input % ...

I found this code through research and am trying to adapt it to my needs.  I have attached a picture to hopefully relay my end goal.     

Hilary, here is that complete portion of the code:        Public Sub CTRL1334_9_Clicked(ByVal sender As Object, ByVal e As ClickedEventArgs)             Dim Nav As XPathNavigator = ...

Yes.  I am using this to try an delete the nil:  Private Sub DeleteNil(ByVal node As XPathNavigator)             If (node.MoveToAttribute("nil", "http://www.w3.org/2001/XMLSchema-instance")) ...

Hilary, It looks like I have everything nailed down except for the 'Delete Nil Node'.  The code cycles through without problems but does not write to the table below.  -Chad

Hilary , Thank you very much for your step-by-step assistance, it is very much appreciated.  - Chad

You were right, once again.  New error: Object reference not set to the instance of an object. - Debug does not show the error.

Sorry, I am running debug now, just getting a little excited to see this  get closer to the end..  This is the new error: Dim PartNumb As String = rows.Current.SelectSingleNode("PartNumb", NamespaceManager).Value

Much closer now: System.NullReferenceException Object reference not set to an instance of an object.    at Bridge_22Apr13.FormCode.CTRL1334_9_Clicked(Object sender, ClickedEventArgs e)    at Microsoft.Office.InfoPath.Internal.ButtonEventHost.OnButtonClick(DocActionEvent pEvent)    at ...

Hilary, you are right with the last response. The repeating table is in located in the Main Fields.