Hi Everyone need some assistance to generate an output message in a Detailed Services Agreement

How can I generate an output message within a Services Agreement?

I need to update service items prices and also create new ones and when using YMMS I got after running the BDC Session a message related to the OUTPUT MESSAGE and when I went an checked the agreement it has NO output message at all not even NEU Status.

How can I fix this???????????? need some help! :-D Thank you!