finding and removing duplicates using attributes

Discussion created by carlosvazquez on Apr 3, 2013
Hi to all,
I found a post from 2009 in the ArcObjects Visual Basic for Application (VBA) forum , the author is John Hauck.
He suggested the following code for finding duplicate geometry:

Sub DeleteDuplicates()
    Dim pApp As IMxApplication
    Dim pDoc As IMxDocument
    Dim pFlayer As IFeatureLayer
    Dim pFeatureClass As IFeatureClass
    Dim pCursor As IFeatureCursor
    Dim pFeature As IFeature
    Dim pFeature1 As IFeature
    Dim ii As Integer
    Dim iFeatureCount As Integer
    Dim pTableSort As ITableSort
    Dim pTable As ITable
    Dim pRelationalOperator As IRelationalOperator
    Dim sFieldName As String
    Dim iFieldIndex As Integer
    Dim sFieldValue As String
    Dim sFieldValue1 As String
    Set pDoc = ThisDocument
    Set pApp = Application
    Set pFlayer = pDoc.FocusMap.Layer(1)
    Set pFeatureClass = pFlayer.FeatureClass
    iFeatureCount = pFeatureClass.FeatureCount(Nothing)
    ii = 0
    If pFeatureClass.ShapeType = esriGeometryPolyline Then
        sFieldName = "SHAPE_Length"
        iFieldIndex = pFeatureClass.FindField(sFieldName)
        Debug.Print iFieldIndex
        If iFieldIndex = -1 Then
            MsgBox "No Field named: " & sFieldName & " in " & pFlayer.Name
            Exit Sub
        End If
    End If
    If pFeatureClass.ShapeType = esriGeometryPolygon Then
        sFieldName = "SHAPE_Area"
        iFieldIndex = pFeatureClass.FindField(sFieldName)
        If iFieldIndex = -1 Then
            MsgBox "No Field named: " & sFieldName & "in " & pFlayer.Name
            Exit Sub
        End If
    End If
    If pFeatureClass.ShapeType = esriGeometryPoint Then
        MsgBox "Decide how you want to approach point layers"
    End If

    Set pTable = pFeatureClass
    Set pTableSort = New TableSort
    Set pTableSort.Table = pTable
    pTableSort.Fields = sFieldName
    pTableSort.Ascending(sFieldName) = True
    pTableSort.Sort pApp.Display.CancelTracker
    Set pCursor = pTableSort.Rows
    Set pFeature = pCursor.NextFeature
    ii = ii + 1
    Do While ii <= iFeatureCount
        sFieldValue = pFeature.value(iFieldIndex)
        Debug.Print sFieldValue
        ii = ii + 1
        If ii <= iFeatureCount Then
            Set pFeature1 = pCursor.NextFeature
            sFieldValue1 = pFeature1.value(iFieldIndex)
            Debug.Print sFieldValue1
            If sFieldValue = sFieldValue1 Then
                Set pRelationalOperator = pFeature.Shape
                Debug.Print pFeature.Shape.IsEmpty
                Debug.Print pFeature1.Shape.IsEmpty
                If pRelationalOperator.Equals(pFeature1.Shape) Then
                End If
                Set pFeature = pFeature1
            End If
        End If
    Set pFcursor = Nothing
End Sub

This code works fine for removing the duplicates but still gives an error, I am new into programming in general and also in Arcobjects. My question is:
Does anybody know how to debug it? or any other option to remove duplicated features using attributes.
Any help will be appreciated.
Thank you

Carlos Vázquez