See
actual calculix adapter is with version 2.20.1 quite old. Perhaps a Meeting in Munich by TUM and MTU can solve this.
In Doku precice 3.0.x is here a team with calculix 2.20 and the adapter 2.20.1.
So perhaps an update is here needed to use all features of new precice 3.4.0.
A great project to couple calculix with other codes with FSI, DEM and more physics.
Here the Roadmap of precice: