Examine the 3D sketch carefully from the Top view at intersection with Sketch3.
I would probably isolate the guide curves on the Front Plane as individual sketches as well.
hello J. Mather,
Thanks alot for your reply.
actually If you could maybe explain it a little more for me it would be appreciated.
Raed,.. as J. Mather noted.. you have 2 contraints on Sketch3... (see image) and the other issue is with contraints in Sketch2 (see image).. the blue (ref) dims shown should be driven and pierced (or coincident).