During the elastic analysis you get the error:
WARNING: Global buckling factor < 1 at “Selfweight”
[NL]: WARNING: Globale knikfactor < 1 bij “Selfweight”
[FR]: WARNING: Coefficient de flambement global < 1 chez “Selfweight”
[ES]: WARNING: Factor de pandeo global < 1 en “Selfweight”
Solution
More information in this article.