Ports and correlations

You must specify at least one already-initialized correlation set for a non-activation receive that is on a non-selfcorrelating port.

There is not a better error to start whin than this wonderful classic. This error happens to everyone all the time. When you start making an orchestration you may be thinking of this, but it will vanish from your mind before the first component is set.

Solution:

The beggining of the orchestration - usually a Receive component - must have the property Activate as True. Why isn't this a default in Biztalk? Good question...