I have managed to send a message using a SOAP sender adapter to a file using the file adapter. The respective message is written to a file. Though both adapters are configured to work in an asynchronous way, the file adapter seems to try to return as message. This results in an error message: "Das Interface-Mapping ... ist nicht im Laufzeit-Cache vorhanden". I have updated and checked the runtime cache. The respective mapping program is available and working, since the file adapter writes the send date to the file. So why this message?