Good catch!

>>>In String you need to omit ?. String is not a simple type like integer, for example. So, you can pass null without declaring string?, just declare parameter as string.
>>
>>So, the adjustment I made is this:
>>
>>

>>        ' Avoid to receive a null
>>        ' expC1 Value
>>        Public Function GetNonNullable(ByVal tcValue As String) As String
>>            Dim lcValue As Integer = ""
>>
>>            ' If we have a value
>>            If Not tcValue Is DBNull.Value Then
>>                lcValue = tcValue
>>            End If
>>
>>            Return lcValue
>>        End Function
>>

>
>
>You're dim'ing lcValue as integer but filling it with a string.... ???