+1 to Ünver + 1 +1 I made a comment about this project before. I even made a different design to spend time and guide. But as Ünver said, you did not take any of the warnings into consideration. Ünver wrote an answer in another link, and we"unver":i0os37y5" said:Sn gencideci YOU HAVE NEVER HEEDED THE FOLLOWING WARNING. WE WRITE AN ANSWER IN A VOID Re: System cannot be resolved error in Modal Analysis... Jacobian Message Posted by unver » 06 Nov 2014, 20:16 Sn gendeci My Suggestion: --You'd better not use the beams that stuck so much. -- isn't there a staircase in the building? ADDITIONAL: MOLD PLAN Take it easy Ünver ÖZCAN