Webservice call from VB6 code results in "Request format is invalid " System error

Question

Hi, here is a code

Private Sub PassTXrecordtoGP(ByVal sopNum As String, ByVal WOnum As String, ByVal mustNumb As String)

Dim objXMLHTTP As MSXML2.XMLHTTP60

Dim sURL As String Dim i As Integer

i = 1
For i = 1 To 3

    If (Len("" & sopNum) = 0) Or (Len("" & WOnum) = 0) Or (Len("" & mustNumb) = 0) Then Exit For
     sURL = "http://192.168.214.111/webservice/integration.asmx/PreauthMode2?WOnum=" & WOnum & "&masterNumber=" & mustNumb & "&invoiceNumber=" & sopNum
    Set objXMLHTTP = New MSXML2.XMLHTTP60
    objXMLHTTP.Open "POST", sURL, False

    objXMLHTTP.Send

    If InStr(1, objXMLHTTP.responceText, "success") > 0 Then   'webservice call is successful, No need to try 3 more times!
        Set objXMLHTTP = Nothing
        Exit For
    Else
        Set objXMLHTTP = Nothing
        GoToSleep 2     'wait for 2 seconds and then retry again!
    End If







Here is an error: 

System.InvalidOperationException: Request format is invalid: . at System.Web.Services.Protocols.HttpServerProtocol.ReadParameters() at System.Web.Services.Protocols.WebServiceHandler.CoreProcessRequest()

status = 500: "Internal Server Error"

What am i doing wrong?

Thanks for help everyone.

Answer 1

Sounds like it is a problem with the Server side. Either you have the wrong address, or the server does not know how to respond to your request because you are sending invalid parameters.

Try a 'Get' Instead of a 'Post' since you are sending your parameters through a querystring.

http://www.checkupdown.com/status/E500.html