Can i use Linear Analysis in SSD to analysis continuous beam with prestressed

Hi. I use Linear Analysis to analysis continuois beam. But stress at top and bottom fiber isn’t correct.
Can i use other task to analysis?

With the task Linear Analysis (Module ASE), the inner forces will be calculated. If you want to check the tension and compressive stresses you need to perform a design check (SLS, ULS) in module AQB for beams.

Best regards,
Your SOFiSTiK Support Team

Thank you very much.