Answer:
You are working with an older version of RFEM or RSTAB that has a lower version number. For example, if you have installed RWIND Simulation 1.23, but are using RFEM 5.22, the version number of RFEM is smaller and the error message appears.
In this case, some adjustments have been implemented in the interface, which require working with the same version level. Please install the latest versions of RFEM and RWIND Simulation. The problem should be solved then.
