Oops, looks like you found a limitation in SW.
It works fine if you do it in 2 features (extrude-boss + extrude-cut):
Open Alin's solidmodel.
Make your original sketch visible on top of the solid.
Start a new blank sketch.
Do a select chain for a loop, convert entities, try to extrude a cut and you will see there is a small sketch error. Fix that and cut out that window ....
The branch all the way on the left has a self intersecting loop. You can see it.
Welcome to the forum.
Another thing to keep in mind that might be messing up your model is if you have imported your
sketch in from a 2D software like Autocad, it is possible that you have lines over lines or imperfect
tangent edges or radius/chamfer corners. If this is the case this will definately cause your model
not to extrude. With a sketch that complicated very easy to do that.
Another suggestion would be to break up the sketches/features into more simplier features such that
all the issues are not lumped into one feature and thus more centralized.
Welcome back to the forum, Scott. While it is true that the sketch has a few duplicated entities and overlaps (as shown by the "Check Sketch for Feature" tool, that is irrelevant in this case, since encloses a region that can be used in the contours field.
Why is the original sketch working (without any modification from my part) in the Cut-Extrude feature?
Thanks Alin. I like to pop my head in once in a while.
Being a discussion forum, one never knows when you bring something to the table what it might spark.
Thanks for the advice, breaking the sketch into segments would have been a good way to isolate problems. The sketch was done entirely in Solidworks over a JPEG.
Sketch done is SW? This is more of a tip for the future, but if you have access to Illustrator, there is a trace tool which will vectorise images. I would be inclined to start there, do as much work in Illustrator, then export a DXF and import into SW.
Actually, I would be inclined to do any detailed drawing work in a graphics package first.