I am trying to boss-extrude the pattern in the figure, but Solidworks keeps saying that is unable to create the extruded feature due to geometric conditions. I don't see what the problem is.
There is a area in your sketch where lines converge to a single point creating infinitely sharp edges.
There are a couple ways around it depending on what you are going to do with the rest of the pattern.
One way is to trim the tips off very small. another would be to join them with some thickness.
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