I am using JuMP 0.19 and I tried to set up an information callback to retrieve the relaxation value of the root node. After a lot of searching I think I got the picture with the non solver independent callbacks.
Do you suggest working with 0.18 and MPB or 0.19 MOI and try to set up the callbacks specifically for Gurobi. Is there any drawback if i continue with 0.18?
Thank you in advance,