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
![Wink ;)](./images/smilies/icon_e_wink.gif)
Thanks in advance,