Hello Mattia, please, read http://en.wikibooks.org/wiki/GLPK/Troubleshooting#Objective_shift_term_ignored_when_exported
Best regards Heinrich Schuchardt http://www.xypron.de Am 11.07.14 um 17:20 schrieb Mattia Buccarella > Hello everyone, > > > > my name is Mattia and I am using glpsol in the development of my master > > thesis in computer science. > > > > I am writing to you all for something I could not find anywhere so far. > > When I use glpsol to solve my model (written in MathProg, with separate > > data input file), all the variables are configured properly as I expect (I > > am referring to a "dummy" input I use to verify the correctness of my > > model). Nevertheless, the value of the objective function is shifted and I > > get the following message: > > > > Model has been successfully generated > > *glp_mpl_build_prob: row obje; constant term 84384 ignored* > > GLPK Integer Optimizer, v4.52 > > ...etc... > > > > Searching the web, I found somebody had a similar issue but it was not > > related to the objective function and also involved CPLEX (context very > > different from mine). Does anybody of you know what is happening? When I > > try to solve the model (same model, same input) with COIN-OR Cbc, through > > AMPL, it gives me the non-shifted value. Also, it does not tell me anything > > about constant terms in the function. Also, I checked again and again my > > objective function: all the terms are functions of some variable, so > > nothing is really constant in the calculation. > > > > Thanks in advance for your help. > > Goodbye. > > > > -- > > Mattia Buccarella > > _______________________________________________ > > Help-glpk mailing list > > Help-glpk@gnu.org > > https://lists.gnu.org/mailman/listinfo/help-glpk _______________________________________________ Help-glpk mailing list Help-glpk@gnu.org https://lists.gnu.org/mailman/listinfo/help-glpk
