The Complete Message:
Beam width cannot be less than 250mm. (TBDY 2018 184.108.40.206)
In TBDY 2018 Article 220.127.116.11 (a) , the beam body width will be at least 250 mm, it is stipulated. You are warned because the condition is not met.
Give the width of the beam given the name and elevation of at least 250 mm.
Select the beam/beams
Enter the properties.
In the general tab, increase the beam width and click the OK button.