Structures such as pools are out of the scope of the regulation according to TBDY 2018 Article 1.1.7.

  • You can ignore the error of insufficient number of mods.

  • If you still want to solve the problem of insufficient number of mods;
    Increment the "target number of modal numbers" that can be entered in Modal E1,E2,E3,E4 and if any, Modal BE1, BE2, BE3, B4, Modal' and Modal B' installations listed under Analysis/Modal Analysis/Modal analysis from the structure tree and repeat the analysis.