After a pipe system is solved, the pipe system is read-only in the Drawing pane. If you decide that you want to modify a solved pipe system, you can return to the Drawing pane in design mode by clicking the Re-Design button on the toolbar. 


If you want to retain the original solved pipe system and the calculated values for the system before you redesign the pipe system, be sure to save the pipe system and results before clicking the Re Design button.


When a pipe system cannot be solved, additional information is displayed in the Results Log and the message, ‘The network was not solved. See log details above.’, is shown. Clicking OK on the Results Log automatically returns you to the Drawing pane in design mode.