Manuel Fernandez de Dios

Hi, The problem is that in this type of model the presolve slows down the solution of the problem. I ran the AMPL version with presolve off, but the R API version with presolve on. That's why I got...

Thanks Matthias, R API interacts with Gurobi with files or by memory? Cheers Manuel  

Sorry Matthias, It's the same problem, log files extracts are from different iterations. Here is the first iteration in both AMPL   Presolve eliminates 0 constraints and 68 variables.Adjusted probl...

Hi Log file extract (1 iteration) R API Gurobi 9.5.1 (linux64, R) logging started Xov 14 Abr 2022 17:49:02Set parameter UsernameSet parameter LogFile to value "TSP.log"Academic license - for non-co...

Thanks a lot, Matthias Cheers, Manuel

Hi, something like that result <- gurobi(model, params) time=result$runtimewhile(#----subtour found--------){    # re = new subtour elimination constraint    model$A=rbind(model$A,re)    model$sens...