HTTP 500 is an internal server error. So, it may not be you.

>Hello, I'm running this code:
>
>loHttp = CREATEOBJECT('MSXML2.XMLHTTP')
>m.URL = "https://celcer.sri.gob.ec/comprobantes-electronicos-ws/RecepcionComprobantes?wsdl"
>loHttp.Open("POST",m.URL,.F.)
>loHttp.Send(ALLTRIM(FILETOSTR("factura.xml")))
>
>but after the SEND command I get loHTTP.status = 500
>with the following response text
>
>soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
>soap:Body> soap:Fault>
>faultcode>soap:VersionMismatch faultcode>
>faultstring>No namespace on "factura" element. You must send a SOAP request. faultstring>
>soap:Fault> soap:Body>
>soap:Envelope>
>
>the file factura XML that I'm sending does match the structure required by the web service, so I don't know whay I'm doing wrong.
>Thank you for any help.