Answer:
In this case, you have defined an RF‑DYNAM Pro case and the results are not available. There are two ways to solve the problem:
- Open the Calculation menu and select "Calculate All".
- Select the RF‑DYNAM Pro add-on module and only calculate the results of it.
Now, you can perform the design again in RF‑STEEL EC3. The RC previously shown in red can now be found under "To Design".