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Unshakable Thin Extrude Error.

I have this error that I cannot seem to solve no matter what I try. I imported an image of a pattern called kites and darts, then I spent 5+ hours tracing it.
I want to do a thin extrude of it so that I can subtract it from my part. I have looked over the sketch several times and I don't see any problems with it that would cause this error. I'm probably just missing something obvious. Any Ideas?
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Answers
Try creating multiple duplicate sketches to break it up into several. Possible you might be running into too many entities in one sketch. But it will also help troubleshoot problem areas if any by sectioning off in smaller tasks.
Also I don't think thin will allow you to have connecting thin cuts in the same feature.