Hi; Your purlins are insufficient due to deflection problem. There is a program error related to deflection in version 8.61, so if you remove purlins from analysis and not split by intersections or remove consoles, the problem will be fixed. In your project, I removed purlins from analysis and they are one piece In this state, you can reduce the cross-section because the strength rates are also very low. A new version is being worked on due to this error. During this time, if you wish, you can continue to use 8.504 or produce solutions as I have stated.
** If it's about multi-cross, in the menu that comes before you while modelling, you can add multiple scissors to the scissors. If you are modeling cross, the value you enter from the menu is not the number of crosses, but the number of jumps of the truss node points.Therefore, when you make 2 entries, 4 crosses are formed. ir. If you enter 4, 2 crosses will be formed. Good work.