I want to run the following runner distribution. The cavities are the spoons only:

If I select a solid mesh, when I try to select the circular sketch as a runner, I get an empty warning:

So I try to define the runner mesh from this another panel. I select and apply the normal runners and the circular bodies as a runner cavities.

So I continue with the settings and I get this message:

I had no another option but to run the analysis with the shell mesh. In this case, the circular bodies were considered as cavities as well. Finally I run the study and it seems to never really begins.

I just wanted to do something like this:

What can I do to achieve this kind of simulation? This file is in the attachments.

Thanks for your advise.