First of all, I am a student in the evening and I discussed the issue of reinforcement in my graduation project... my questions are as follows, first I enter the building I will strengthen into the system, as c16 s220 s220 (ide6.00 demo) The first question that stuck in my mind is do I need to introduce the reinforcement in each column and beam to the system, As we can enter the reinforcement areas in the columns and beams in sap 2000, is it possible to enter here as well... let's say the building was built in 1970, how do we transfer the reinforcements inside it to the system, for example, if 6 fi 12 was placed in a column in 1970, should we introduce it to the system?... I'm stuck here. ... 2) I analyzed the system directly, but I thought that by removing the tick next to the automatic reinforced concrete design in the analysis settings> tab> I ensured that the minimum reinforcement was placed ... how accurate is the process I did after 3) linear performance analysis to detect insufficient sections in that area. and/or I went for improvement in the section with curtain and sheathing 4) I made the last of the improvements I made to the system. Then, when I wanted to analyze again, I got the error that the system cannot be resolved (while the automatic reinforced concrete design tab was not clicked) ... I wonder why I need to save the system separately and analyze it? it was a bit of a confused explanation, but my head stopped as of this hour I would like to thank you in advance for your help...