Answer:
In order to generate the FE mesh, it is necessary to meet the following conditions in this case:
- Both contact surfaces must be modeled in parallel: all nodes, lines, and integrated objects must match, even if an object at one of the contact surfaces is not used.
- In order to be able to generate an FE mesh while also taking into account any unused objects, activate the "Integrate unutilized objects into surfaces" option in the FE mesh settings (see Image 02).