Async Interface being called synchronously via Web service/SOAP

Question

Hi,
I have an asynchronous interface to receive data into XI which is being sent to a file system, I can successfully use this interface to send data to XI using the file sender communication channel, and the monitoring shows the same as asynchronous.
The problem is when i want to use the same setup to send data from a .Net client using SOAP/Web service. This time if I go to monitoring I get to see that the call is synchronous..????... which is quite baffeling...
I am not calling the XI webservice in synchronous mode I am calling the BeginInvoke method thus making an async call.
what is it that I have to do to get the interface to behave as async on being called from a webservice?
Thanks
Aniruddha

Answer 1

Thanks guys. I do understand that this is a old post. However I cannot find the following information. I too have C# Web App call SAP PI BAPI web service getting [NullReferenceException: Object reference not set to an instance of an object.]
Extract of WSDL: In the Request section: How do I initialize these fields:
COMPTEGENERAL
               ITEMS occurs 0 to unbounded.
                         NUMERO_OU_NO_DE_COMPTE String
                         COMPTE_GENERAL String
                         CENTRE_DE_COUTS String
                         MONTANT_DEVISE Decimal
webservicename.COMPTEGENERAL[] = new Mywebservice.Request FromWS[0].ToString();// Does not Work.
   <xsd:element name="COMPTEGENERAL">
            <xsd:annotation>
              <xsd:appinfo source="http://sap.com/xi/TextID">9ce79547e32411e2a321f4ce4610676a</xsd:appinfo>
            </xsd:annotation>
            <xsd:complexType>
              <xsd:sequence>
                <xsd:element minOccurs="0" maxOccurs="unbounded" name="ITEM">
                  <xsd:annotation>
                    <xsd:appinfo source="http://sap.com/xi/TextID">85ebea01eedf11e2bbe7f4ce4610676a</xsd:appinfo>
                  </xsd:annotation>
                  <xsd:complexType>
                    <xsd:sequence>
                      <xsd:element name="NUMERO_OU_NO_DE_COMPTE" type="xsd:string">
                        <xsd:annotation>
                          <xsd:appinfo source="http://sap.com/xi/TextID">85ebe9faeedf11e29c4bf4ce4610676a</xsd:appinfo>
                        </xsd:annotation>
                      </xsd:element>
                      <xsd:element name="COMPTE_GENERAL" type="xsd:string">
                        <xsd:annotation>
                          <xsd:appinfo source="http://sap.com/xi/TextID">85ebe9fceedf11e28cd7f4ce4610676a</xsd:appinfo>
                        </xsd:annotation>
                      </xsd:element>
                      <xsd:element minOccurs="0" name="CENTRE_DE_COUTS" type="xsd:string">
                        <xsd:annotation>
                          <xsd:appinfo source="http://sap.com/xi/TextID">85ebe9fdeedf11e2b57df4ce4610676a</xsd:appinfo>
                        </xsd:annotation>
                      </xsd:element>
                      <xsd:element name="MONTANT_DEVISE">
                        <xsd:annotation>
                          <xsd:appinfo source="http://sap.com/xi/TextID">85ebea00eedf11e2bdcbf4ce4610676a</xsd:appinfo>
                        </xsd:annotation>
                        <xsd:simpleType>
                          <xsd:restriction base="xsd:decimal">
                            <xsd:totalDigits value="18" />
                            <xsd:fractionDigits value="4" />
                          </xsd:restriction>
                        </xsd:simpleType>
                      </xsd:element>
                    </xsd:sequence>
                  </xsd:complexType>
                </xsd:element>
              </xsd:sequence>
            </xsd:complexType>
          </xsd:element>
        </xsd:sequence>
      </xsd:complexType>
    </xsd:schema>
  </wsdl:types>