how to get the DEP force

Hi everyone
How to get the DEP force in the particle tracing module?

I add the DEP force in the particle tracing module and than study it.

But the errors are as follows:
Failed to evaluate variable Jacobian.
- Variable: freq
- Geometry: 1
- Domain: 5
Failed to evaluate operator Jacobian.
- Operator: env_pgeom_fpt
- Geometry: Particles
Failed to evaluate operator Jacobian.
- Operator: env_pgeom_fpt
- Geometry: Particles


I get the electric field data from the RF module