STADD PRO and RC Designer Concrete Design Issue

Question

Hi All, 
 
 I am facing one issue regarding different result while doing beam design using STADD PRO v8i and RC Designer(Interactive). 
 Corresponding to Beam No 61(Member 7), I am getting huge difference is Ast of both the results, however moment value is almost same. Kindly help me to resolve this issue. 
 Also, Beam No 116 is passed in design by STAAD PRO but it failed in concrete design by RC Designer. Please help here also.

STAAD RESULT 
 RC DESIGNER 
 STAAD RESULT 
 RC DESIGNER

Beam No 
 L/C 
 Mz kNm 
 Mz kNm 
 Area of Steel 
 Area of Steel

61 
 COMBINATION LOAD CASE 3 
 71.183 
 71.2 
 1230 
 1608

-490.895 (SAGGING) 
 -491 (SAGGING) 
 2570 
 3217

Also, please find attached model for your ease of working. 
 
 4532.Assembly Hall Project.std

Modestas · Answer

STAAD.Pro V8i is not supported anymore. I would recommend you to upgrade to the most recent STAAD.Pro CONNECT Edition version (22.06.00.138) and performed the concrete design in the Advanced Concrete Design workflow (RCDC).