Hello everyone,

I am trying to export coupled system matrices for acoustic-structure interaction in the mtx format to reconstruct the finite element (FE) matrices subsequently. However, three things go wrong:

1. The size of the system matrices does not match those declared in the Data file
2. When assembling an acoustic medium with a structure, no unique node numbering is done
3. When creating node sets, I don't get the node IDs in the input file.

Anyone who has done that before? I aim to reconstruct the coupled system matrices for further processing in Python.

Best