In the attached file, SW is telling me that my sketch “SKETCH Middle Hole” has multiple open contours. Yet I can’t find any upon inspecting, primarily because it’s a fairly detailed sketch. It’s also worth noting that I made this symmetric sketch by creating half and then doing a mirror of everything.
All help is appreciated, though especially those comments with screenshots - I’m a very visual learner !
I would recommend leaving the sketch fillets out, and placing them as fillet features later on. Tangent arcs are one of the biggest problems in SW sketching. All of your problems here are related to tangent arcs. Some you can avoid, some you can’t.
You have to be precise with sketches, and you should always have them locked to something that won’t move either with a dimension or a sketch relation.