Hi @Bianca_Gritti,
we don’t have much experience with this feature, and we don’t have a tutorial either. Any observations or further input here would be very useful to improve the support, and rarely (if at all) someone asks for it, so I see potential here.
You probably already saw the documentation section of the CalculiX adapter, which is mostly there as a hint, rather than a tested feature:
Since the breaking-dam-2d tutorial is also known to have issues when running in parallel (see Breaking dam 2D fails in parallel · Issue #710 · precice/tutorials · GitHub), I would recommend starting with the perpendicular-flap. Does that work fine for you?
When the feature was developed, it was tested with the perpendicular-flap tutorial and with implicit coupling, but it has not seen much activity since then. One of the related PRs: