bugs during running the incompressible optimization for the airfoil

[MachAeroDeveloper]

h ave two problem professor
1- i use the same runscript.py for naca0012 airfoil after i chnage the airfoil of s809 and everything is working which i have been changed the coordinate of airfoil and the ffd point and the mesh and every thing working fine till i get this error i hope you help me on this problem and a appreciate your reply and help and thank you advanced
2- the file paraview.foam is empty and can not give any result of my optimization