Answer:
You have installed an outdated version of RFEM 6 or RSTAB 9, where the Concrete Foundations add-on was not available. Install the latest version of RFEM or RSTAB. You can download them in the Dlubal Center.
Add-on Concrete Foundations
I cannot activate the Concrete Foundations add-on. Why?
Author
Frank is responsible for quality assurance in the RFEM program and also assists with customer support. He oversees technical design processes and contributes to the stability and reliability of the software.
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