Computing the kinetic energy

Hi there,

When trying to compute the kinetic energy I am getting the following error message:

Failed to evaluate variable.
- Variable: material.rho
- Geometry: 1
- Domain: 2
Failed to evaluate variable.
- Variable: comp1.elw.rho
- Defined as: material.rho
Failed to evaluate variable.
- Variable: comp1.Ec
- Defined as: ((comp1.elw.rho*(((realdot(comp1.u,comp1.u)+realdot(comp1.v,comp1.v))+realdot(comp1.w,comp1.w))*0.25))*(comp1.elw.omega^2))
Failed to evaluate expression.
- Expression: real(comp1.Ec)
Failed to evaluate expression.
- Expression: real(comp1.Ec)

I have tried different way to evaluate the kinetic energy, but always getting the complaint about: the variable rho. I appreciate any assistance.

Thanks