Hi; The problem is that the connection of your individual braces with the beams is not created correctly when the analysis model is set up. With this problem, there are some faulty points in your modeling: 1- Your diagonal placement must be compatible with each other and suitable for the geometry of the roof 2- Your purlins must be placed in harmony with each other for the entire roof surface 3- Since the definition is made on the reinforced concrete structure, all columns must fit on reinforced concrete beams or columns. In the versions, the columns sitting on the slab are not connected to the slab finite elements network. In this case, you make an incorrect analysis. 4- The coating was not defined in your project, we defined it and entered an approximate load value, you can check it according to your region and production and change it if necessary. 5- Since the roof is vaulted, if you choose pipe section instead of box section for your cross members, the joints will be formed more healthily. Your model is attached to save all these arrangements and sections, you can complete your model after making detailed checks.
Best regards.