Is there some reason not to generate call of OnFetch() and OnFetchComplete() methods into FetchUsingUCxxx() methods?

I am able to add the method calls to the entityInclude.template but it is not so clear and maybe I am breaking some design concept...?

I believe that OnFetch and OnFetchComplete are used for multi row fetches and not single row fetches. OnFetchEntity and OnFetchEntityComplete are used for single row fetches.

Ok, couple of issues: 1) you're correct, the UC fetch doesn't call OnFetch and OnFetchComplete. That's a bug. 2) in multi-row fetches, OnFetchComplete is called but not OnFetch. Also a bug. it must be my lucky day

issue 1 is a template issue, The fetch routine for UC fetches has to receive the try/finally block as Fetch() has. issue 2 is a runtime lib issue.

(edit). Fixing 2 is not doable, as in a multi-entity fetch, an entity is created together with fetched fields, so it's never the same situation as with Fetch(), which calls OnFetch when the entity is empty. -> not fixed.

Issue 1) is addressed in next build (via a template fix).