Hello Manjunatha,
Multiple parts in a WSDL is only supported for RPC-style WSDLs, not for document styles. See SAP KBA 1714792 for details.
Could you check, if your WSDL is RPC-style or not? You can find this information in the WSDL, within the binding section. E.g.
<binding name="BarSOAPBinding" type="bar:BarPortType">
<soapbind:binding transport="http://schemas.xmlsoap.org/soap/http/" style="rpc"/>
If it's document style, the WSDL is not supported as it is. Follow the instructions in above linked KBA for solving this.
Cheers,
Attila