'Port1' does not have a mesh instance

Hello FEKO users,

 

Today I started my first simulation with CADFEKO version 7.

 

I just ...

- created a helmholz coil

- set the frequency

- set loads

- set voltage source

- requested the near field

- meshed all parts

- CEM validated the simulation (all green)

- started the solver

... and then I the error occured as mentioned in the title.

 

What I have done so far:

- I made sure that no other FEKO project is interfering.

- A .pre-file has been created, but no .out-file.  But the .pre-file does not say more to me than the error window.

 

Does anybody know what my problem could be?

Many thanks in advance!