How to solve Detailing failure of Beam in Staad RCDC?

I am working of a factory building,

1. area of (119578*46422)sq.mm .
2. Its holding Live Load of 130 psf .
3. Columns 20 Nos. in long & 8 Nos.in short direction
4. Dead Load is of Main wall(0.8353 ksf)+Partition wall(0.363 ksf)+Floor Finish(0.03 ksf)+Self Weight(-1)+Parapet wall(0.11 ksf)
5. fy=60,000psi & fc'=2500psi

But after importing & designing in Staad RCDC its showing -"Detailing failure ".

• How to solve this problem , Guys help me?
• Why this problem is showing , can any one tell me ?

By the way I have tried a lot of dimensions[(18"*24"),(24"*24"),(30"*30"),(20"*16"),(36"*36")] but neither of them worked .

Columns beneath are (600*600) & (450*750)mm