Status Code 415 - Unsupported Media Type

Hi all,

if I execute a POST Request in Transaction /IWFND/GW_CLIENT I get the error message "Unsupported Media Type" (See Screenshot").

My approach was following:

1. Execute a HTTP GET request
2. Press Button use as request
3. Change method to POST
4. Execute

I already changed the header content type to text/xml, without success.

Any ideas?

Regards

Christ