In every input window of RF-CONCRETE Members, you can start the calculation with the [Calculation] button.
RF-CONCRETE Members searches for the results of the load cases, load combinations, and result combinations to be designed. If they cannot be found, the RFEM calculation initially starts in order to determine the design-relevant internal forces.
You can also start the calculation in the RFEM user interface: The To Calculate dialog box (menu Calculate → To Calculate) lists the design cases of the add-on modules such as load cases or load combinations.
If the design cases of RF-CONCRETE Members are missing in the Not Calculated section, select All or Add-on Modules from the drop-down list below.
To transfer the selected RF-CONCRETE Members cases to the list on the right, click 
.
Then, click [OK] to start the calculation.
To calculate a design case directly, use the drop-down list in the RFEM toolbar: Set the RF-CONCRETE Members case and click the [Show Results] button.
You can subsequently observe the calculation process in the solver dialog box (see Figure 9.20).