Hi,
I think your problem is caused by the lack of a mime-type registration for type “application/smil” on either the client, the server or possibly both.
When you use the Interactive Interface to send a _Process request to Tamino, the input is obtained from an form field, and the request-type for the form submission is “multipart/form-data”. The processing of such requests is described in RFC1867:
3.3 use of multipart/form-data
The definition of multipart/form-data is included in section 7. A boundary is selected that does not occur in any of the data. (This selection is sometimes done probabilisticly.) Each field of the form is sent, in the order in which it occurs in the form, as a part of the multipart stream. Each part identifies the INPUT name within the original HTML form. Each part should be labelled with an appropriate content-type if the media type is known (e.g., inferred from the file extension or operating system typing information) as application/octet-stream.
So in your case it looks as if the client machine is unable to prepare a suitable content-type header because .smil is not registered as a mime type.
Does this help at all?
#Tamino#webMethods#API-Management