Hi Volker,
you are not receiving the messages via PI, right?
With NetWeaver 740 a new web service runtime and persistence was introduced. AIF provides some new engines for this new WS runtime. I would assume that you could solve the issue with one of the below options:
- Change the persistence and application engine to "New WebService"
- Implement note 2312971. After implementation of the note you should be able to keep the proxy engines. The proxy engine will call the new web service engines for web service messages then.
Best regards,
Verena