Milestone years limitation

[JozefO]

Hello dear modelers. I would ask if the Veda has limitation on numbers of milestone years?
I im interesting if its possible to model time horizont from 2024 to 2035 year by year?


COM_PROJ~2024 = 2.4 tonnes
COM_PROJ~2025 = 2.3 tonnes
COM_PROJ~2026 =  2.2 tonnes
.
.
.
COM_PROJ~2032 = 1.7 tonnes
COM_PROJ~2033 = 1.6 tonnes
COM_PROJ~2034 = 1.5 tonnes
COM_PROJ~2035 = 1.8 tonnes

My model works fine up to 2032 but when i set last year 2035 model is infeasible. 

Thanks

[Antti-L]

> My model works fine up to 2032 but when i set last year 2035 model is infeasible.

If your model is infeasible, the first thing to check whether the solver gives information as to why it is such. Infeasibility is often discovered already in the presolve phase, and at least Cplex then reports the reason for the infeasibility (but you should use names yes in cplex.opt to get a meaningful report). If it is not detected in the presolve phase, Cplex may or may not be able to report the reason. In any case, you could also try enabling dummy imports for all of {NRG, MAT, DEM}, maybe even for UCs, if they were not enabled, and then you may well get a pseudo-feasible solution and will be able to see from the dummy results where the problem is. If still no luck, I would suggest to try and run the model with the Cplex infeasibility finder (if using Cplex).

By using the option SYSOUT=ON; in the RUN file you can get the infeasibility report written into the listing file. It is also written into the *run_log.txt at least when detected in the presolve phase.