I try to have the developed with the different bend lines of a shape.
I created two parallel planes, each with an open profile sketch: a circle for one and a broken rectangle at each corner for the other.
I select Sheet Metal / Transition Fold, the Broken manufacturing method and validate my two sketches.
When validating my parameters an error appears: "the function could not be created because it will create an intersecting geometry". No matter how much I change the different options offered, I can't fix this problem.
My mistake was to click on the endpoints (as explained here: http://help.solidworks.com/2018/french/SolidWorks/Sldworks/HIDD_SM_LOFTED_BEND.htm?verRedirect=1 ). By clicking a segment of the first sketch and the circular part in front of it of the second, it works.