retrieve the lower bound

Dear all,

I am solving a model with baron through gams. I would like to retrieve the lower bound and the upper bound of the objective function obj.
There is a variable where the LB is saved: I image that obj.l return the upper bound.

Thanks in advance. Best regards,
Luca

Correct, obj.l or modelname.objval return the incumbent and hence an upper bound on the global optimum (for minimization problems). modelname.objest (see https://www.gams.com/latest/docs/UG_ModelSolve.html?search=objest) give you the lower bound returned by Baron (and many other solvers that work with a global lower bound):

option minlp=baron;
solve spring using minlp minimizing volume;
display spring.objest, spring.objval;

-Michael