Could not orient normal of surface
I have a 2D domain consisting of 3 layers. The boundaries of each layer consists of 1000 points and 1000 lines between them. The points and lines generation can be seen in the attached file. The problem is, whenever I try to mesh my region I receive this "Warning : Could not orient normal of surface #". Can someone tell me how I can fix this?
Thank you in advance.exercise.geo