Boolean Function for Elements?

Hello,

I'm working with a model that contains 2 components.

1. Comp contains surfaces, solids and elements
2. Comp contains lines, surfaces and Elements. A solid can not be created from the surfaces.
I used another way though to create Tetraeder Elements to fill the volume contained by the surfaces.

The 2nd component is placed within the 1st component.

Now I want to cut out the space of the 1st comp, so that the 2nd comp fits in without having the elements of both
components overlap.

Basically I want to use a boolean function for elements, like the 'solid edit>boolean>A-B (del B )' function for solids.
But as I can't create a solid from the surfaces of the 2nd comp. I need to go another way than the traditional boolean.

Is there something like boolean for elements?

Kind regards,
Niclas_emi