Question data row already belongs to this table?

[Pedro]

Hello, does anyone know why i have an error " This row already belongs to this table"? I want to add a few rows to a table but..
I've created the table:

Dim dtList As New DataTable

        With dtList
            .Columns.Add("Pk")
            .Columns.Add("M")
            .Columns.Add("P")
            .Columns.Add("Z")
            .Columns.Add("Rumo")
        End With

        ObraDataSet.Tables.Add(dtList)

I've created the row:

 Dim drCurrListagem As DataRow = dtList.NewRow

after some calculations,

drCurrListagem("Pk") = Pkcurr
                            drCurrListagem("M") = X
                            drCurrListagem("P") = y
                            drCurrListagem("Rumo") = Rumo


                            dtList.Rows.Add(drCurrListagem)

What's wrong??

thanks for your help, i can't figure it out...

 

[cjard]

Either youre adding a row with a PK that already exists, or the row youre adding has already been added. Post the full code please, not just snippets of it