tle4336

@jjhforrest Thank you so much for your help on trying different solvers. Did you still get 'Infeasible' status with **Infeasible1.mps** AND **Infeasible3.mps** files with those different solvers? Because if that...

Do the other solvers say the same thing for Infeasible1.mps and Infeasible3.mps? I am trying to reinforce why the two packages `lpsolve` and `CBC` came to different conclusions on the...

@jjhforrest Do you have any ways to read this '.lp' file into Python and call CBC solver to solve it? This '.lp' file is generated by R, but my thorough...

@tkralphs Thank you. @jjhforrest I have a quick question: how do we invoke the `loglevel 3` message to display which constraint is violated in an infeasible problem? That would be...

@jjhforrest Hi Dr. Forrest, I figured out the above problem by turning off the `presolve` thanks to the help of @chmduquesne . I have another question though: is the bug...

Dr. Forrest here seems to indicate, from his own run, that the problem is with `pulp`, not with `cbc` . However, looking at the disrepancy displayed from the part of...

@dims @dpo @wookenny @chmduquesne How can we turn off the `presolve` option of CBC solver via `pulp`? I tried following this link but the presolve step still occurs, which led...

@chmduquesne Thank you so much. I will try out setting the `presolve` to `None` (you are spot-on that I set it to `False`). However, I am not sure what you...

@chmduquesne Just a quick update. I tried to set `presolve=None` within `solver=pulp.PULP_CBC_CMD(presolve=None)`,and then call it via `optimize.solve(solver)`. Still see the presolve step being conducted (and again, the result from presolve...

@chmduquesne Thank you so much for your sharing. I tried it out with your **great** instructions, but the added code above unfortunately did not stop the `presolve` from being executed....