https://community.appian.com/discussions/f/integrations/14468/call-web-service-soapwhile accessing a service getting below error while selecting an operation on a Service. due to this error webservice is not able to create CDT. This Operation is unavailable. The following error occurred during the creation of the message schemasen-USTelligent Community 12https://community.appian.com/thread/65060?ContentTypeID=1Wed, 06 Mar 2019 20:23:27 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:f5375f1a-6bb0-4f4c-9786-11b4e2d39870Carlos SantanderMy guess is that your WSDL is using a feature that Appian doesn&#39;t support. See the relevant links below.<br /> <br /> <a href="https://docs.appian.com/suite/help/19.1/Call_Web_Service_Smart_Service.html#unsupported-xsd-constructs">docs.appian.com/.../Call_Web_Service_Smart_Service.html</a><br /> <a href="https://docs.appian.com/suite/help/19.1/Call_Web_Service_Smart_Service.html#unsupported-web-services">docs.appian.com/.../Call_Web_Service_Smart_Service.html</a><div style="clear:both;"></div>