ArityMismatch error in 3D elasticity + scalar field

[anupama]

I am facing the same kind of error with my code.
Attaching the link to my code.
Could anyone help me correct it?

ArityMismatch error

I am a beginner user of fenics. I am writing a code for phase field ductile fracture. The following is my code. I have removed the part for solution of damage variable in the staggered algorithm, and the function for return mapping algorithm. # PHASE FIELD DUCTILE FRACTURE # Von mises J2 plasticity #------------------------------------------------ from dolfin import * from matplotlib import pyplot import numpy as np #------------------------------------------------ # MESH #-…