1]**WARNING- ZERO SPECTRAL ACCELERATION ENTERED FOR MODE 1 2] Beam forces not imported in RCDC

A019_PX2_Control Room BLDG_R5-23.05.2022.STD

How to resolve the error in staad ********warning : zero spectral acceleration entered for mode 1 

and also when i am trying to design beam in Rcdc after auto design it is showing that ************Beam forces not imported ****************