Iam trying to design Concrete beams for STAAD File in RCDC, but it gives me a Detailing failure warning for some beams, I tried to change the size of the beam and the material used for the design but no matter what size i choose, this failure  won't be solved . 
Would really appreciate if someone can guide me on that 

communities.bentley.com/.../STAADAssignment_2D00_Beam_2D00_1_2D00_7.5m.rar