I'm practicing for the CSWP Advanced Surfacing Exam and for the life of me I can't create a filled surface where I need one. It should be pretty straight forward. I'm using the parameters stated on the exam I'm working from in regards to using curvature and unchecking Optimize surface. Can anyone give an opinion as to why the filled surface won't work? I don't know if it has anything to do with the 1st loft I created which I used a guide curve on. See images below of the problem and the zebra stripe of the loft. Does that look correct? I'm not too well versed in using zebra stripes but thought it might be useful to show.