Hello Benedikt,
Have you already taken a look at our Dlubal API (gRPC)?
Using the definition of global parameters in RFEM and their modification via API, parameter studies can be carried out very conveniently. I plan to write a technical article on this topic and will share it here upon publication.
Currently, the parametrization of steel connections is not yet implemented. However, the customer request for this is known. I have added you here as an interested party.
Until this feature is implemented, it should be possible to change the parameters of the steel connection object via the API. An example of the definition of steel connections can be found in the example collection of the API documentation.
Best regards
Marc