I have an issue for creating a functional chain on a SAB diagram :
There is a specific functional exchange that is impossible to add to a functional chain. Each time I want to add it to my selection, when I do a right click to create the functional chain, the button to create it is not present. And when I exclude it to my selection the button “Functional chain” is back …
Is there any reasons why this specific functional exchange cannot be included in my functional chain ?
Problem is hard to explain clearly … sorry for that!