Hello; The top of the scissors should be horizontal cross with a full and empty space. The bottom head of the scissors must pass through the stability beam from the middle point. For this, the top of the scissors must pass through the stability beam. The only cross member you entered in the heading of truss has been taken to the subheading of the truss. You have chosen a central braced system, but you do not have any vertical braces in the X direction. Either turn it into a moment-transmitting frame or define it in the vertical diagonal in the openings where there are braces on the roof in the x direction. At the same time, if you are going to make a central diagonal entry, you have to use the beams in the x direction. In the freedoms sub-tab, check the boxes for both the i end and the j end for M2 and M3. These openings cannot be passed with such low cross-sections, select the cross-sections of the lower and upper heads of the scissors in the order of CHS 127 * 10, etc.
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