Column longitudinal rebar diameter cannot be less than Ø14.
This message is given with the element and story name at the beginning of the report
For example, C1, 1st floor, Column longitudinal rebar diameter cannot be less than Ø14.
in TBDY Article 7.3.2.1, no longitudinal rebar less than φ14 will be used in columns and no less than 6 pieces of rebar will be used in circular columns. You receive a warning because this condition is not met.
Solution :
Use longitudinal rebar with a diameter of 14 mm or higher in columns where error messages are given.