I am using Interop to read and write to excel but I'm having some problems writing to excel... When I enter the information I need to be written on the excel in an inputbox, this pops up "COM object that has been separated from its underlying RCW cannot be used."
Heres the Code:

Code:
 Private Sub editmodelbtn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles editmodelbtn.Click
        Dim message, title, defaultValue As String
        message = Enter New Model"
        title = "Editar Modelo"
        defaultValue = ""
        edit = InputBox(message, title, defaultValue)
        If edit = "" Then
            MsgBox("No change Made", MsgBoxStyle.Exclamation)
        Else
            xlWorkBook = xlApp.Workbooks.Open("C:\Users\DF\Desktop\testing.xls")
            xlWorkSheet = xlWorkBook.Sheets("Sheet1")
            xlApp.Visible = False
            xlWorkSheet.Cells(product, 3) = editar
            xlWorkBook.Save()
            xlWorkBook.Close()
            releaseObject(xlApp)
            releaseObject(xlWorkBook)
            releaseObject(xlWorkSheet)
        End If

    End Sub
product is a string from a textbox, thats another problem but this error appears on the xlApp.workbook.open. Any ideas?