We are attempting to connect to AEM 6.5 from a legacy system that was connected to AEM6.4. After updating the AEM to 6.5 and upgrading the proxy jars we are getting the following error when we try to call the Formservice over SOAP.
The issue was with the proxy creation. The adobe documentation are not accurate. When you create the proxies using WS Import the packages got created correctly and resolved the issue.Thanks all for checking.