I have been working on Aquh tonight. I have been trying to add a swim plane/region to Aquh. With the plane and region in I get the following error.
ensure: condition not met
When I delete the plane, and region, the error goes away.
I also noticed when both were left in and I tried to swim I could go like only a foot and then the avie would stop swimming, stand upright, and would have jerky movements (regardless if I am swimming or leaving it alone).