Object reference not set to an instance of an object

[dorandoran]

What could cause "Object reference not set to an instance of an object." error? I was trying to read the envelope table. I got the code from the 3rd link below.

http://www.e-topco.com/oa/oa_help/OpenAir_SOAP.htm
http://www.e-topco.com/oa/oa_help/Complex_Types/Intro_Complex_Types.htm
http://www.e-topco.com/oa/oa_help/Code_Examples/Code_Examples.htm

Here is the code I am using

    Private Sub btnProject2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnProject2.Click
 
        Dim stub As New com.openair.sandbox.OAirServiceHandlerService()
 
        Dim req As New ReadRequest()
        req.type = "Envelope"
        req.method = "all"
        Dim env1 As New oaEnvelope
 
        req.objects = New oaEnvelope() {env1}
        Try
            Dim results As ReadResult() = m_svc.read(New ReadRequest() {req})
 
            ' iterate through our results and output them to console
            For Each result As ReadResult In results
                ' output any errors
                If result.errors IsNot Nothing Then
                    For Each err As oaError In result.errors
                      MessageBox.Show("Error " + err.code + ": " + err.comment + "" & Chr(9) & "" + err.text)
                    Next
                End If
 
                ' output the envelope read results
                If result.objects IsNot Nothing Then
                    MessageBox.Show("Received " + result.objects.Length + " envelope(s) from OpenAir")
                    For Each env As oaEnvelope In result.objects
                        MessageBox.Show(Chr(9) & "" + env.id + env.total + env.date + env.name + env.tottickets)
 
                    Next
                End If
            Next
        Catch ex As Exception
            MessageBox.Show("Error while reading envelopes:" & Chr(10) & "" & ex.Message)
        End Try
    End Sub
 

[Plater]

Do you know which line caused the error?

[dorandoran]

result.objects is showing nothing when i stepped through the code and thats why it's giving me an error. but why it's showing nothing.

[Plater]

Is results ITSELF "nothing"?

[dorandoran]

result is nothing. but i know for fact there are tons of records that i should get in return.

[Plater]

Well, I don't know what's going on here:
Dim results As ReadResult() = m_svc.read(New ReadRequest() {req})

but maybe check into that section?