Fail to evaluate variable. (material.epsilonr13)

Hello,

I would like to calculate the electric field within a chamber with gaseous xenon filled out all the space. In the meanwhile, there is another hollow cylinder inside the chamber which is made up of PTFE with 14 copper rings surrounding. So far, I have only used a physic "Electrostatics" to build this simulation. After adding the mesh type "Free Tetrahedral" to all the geometries, I kept receiving the following errors which prevented me from simulating the electric field.

Failed to evaluate variable.
- Variable: material.epsilonr13
- Geometry: 1
- Domain: 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 ......
(There are lots of domains included but I just leave them aside to make the message cleaner)


Failed to evaluate variable.
- Variable: comp1.es.epsilonrxz
- Defined as: material.epsilonr13

Failed to evaluate variable.
- Variable: comp1.es.chixz
- Defined as: comp1.es.epsilonrxz

Failed to evaluate variable.
- Variable: comp1.es.Px
- Defined as: (((comp1.es.Ez*comp1.es.chixz)+((comp1.es.chixx*comp1.es.Ex)+(comp1.es.chixy*comp1.es.Ey)))*epsilon0_const)

Failed to evaluate variable.
- Variable: comp1.es.Dx
- Defined as: (comp1.es.Px+(comp1.es.Ex*(comp1.es.Ixx*epsilon0_const)))

Failed to evaluate expression.
- Expression: d((-(comp1.es.Dx*test(comp1.Vx)+comp1.es.Dy*test(comp1.Vy)+comp1.es.Dz*test(comp1.Vz))*comp1.es.d)*(dvol),{test@4})

As for me, I think the most serious problem comes from the first error but I am not able to solve it.

I would really like to ask for your favor to give me some tips to solve these errors.
Thank you very much.

Sincerely,
Pin Jung