Optimization Problem

[GersonMachado8699]

Hello,

I am having an issue concerning the utilization of the Optimization tool. When I press the Perform Design Optimization and press Analyze, I get the following message:

Model Name = C:\Users\yossef.didi\Desktop\testes ponte 45m

# of Design Variable = 4 # of Performance = 4
Optimization Method = 1 MaxIter = 20
MaxObjChange = 0.010000

** Design Variables **
===============================================================================
Design Part# Property Lower Limit Current Value Upper Limit

** AISC Beam Section Type should be same for %d th design list !!

On the Design Optimization window, on Design Variable, all of my variables have been inserted by myself, and I don't know if that's normal.

Also, I put the Objectives/Constraints according to my needs, and at least that I think is correct.

Can someone help me to understand the error I'm getting and to make this optimization work?

Thanks in advance!