This is the link of my video : https://youtu.be/vAUB8Zj4APg
Here's the link for the blender file : https://www.dropbox.com/s/fz7f0s0l3tl0ob1/gridfill.blend?dl=0
Basically i just want to create surfaces using GRIDFILL command. The left edges has no probelm while the right one give me weird error. I tried to find out what really happen but have no clue. Can anyone help ? i've attach my blend file to test.