In a sketch I select the split entities tool and then I "click on the sketch entity to split" ....and nothing happens. Its seemed like the pointer is snapping to end points so I make sure snap is off and.... still nothing happens.
I've tried other sketches etc and still not work.
try a slightly different workflow. Select the sketch entity that you want to split, right-click and select 'split' from the list and pick the point on the entity where you want the split to occur. You can then select additional points on the same or other sketch segments.
If you're trying to split a circle, you have to pick in two places.