I've created just a square to make sure its not the shape or if one corner isn't connecting but still no luck
Are you sure the sketch belongs to the drawing view? See #14 atFrequently Asked Forum Questions
Make sure the view is active before adding the sketch. It can only be a normal view, not a section view or ?
Also you can't create a crop view of a Detail or if a detail view is generated from the view you are trying to crop
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