Answer:
The RF‑/EL‑PL add-on module is only used for the elastic-plastic design of steel cross-sections. As a result, you can only calculate materials from the "Steel" category in the add-on module.
Question
When trying to calculate a material from the "Aluminum" category in the RF‑/EL‑PL add-on module, I get an error message. What is the reason for this?
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