With glpk 4.52 and with the attached input, I get the following failure/error:
------------------------------------------------------------------------------ $ glpsol --lp mi.cplex Warning: numerical instability (primal simplex, phase I) 2979: obj = 1.092652474e+04 infeas = 5.265e+09 (0) Warning: numerical instability (primal simplex, phase I) 2996: obj = 1.092637382e+04 infeas = 5.260e+09 (0) 3000: obj = 1.092644011e+04 infeas = 5.235e+09 (0) Warning: numerical instability (primal simplex, phase I) 3051: obj = 1.077725595e+04 infeas = 5.201e+09 (0) Warning: numerical instability (primal simplex, phase I) 3059: obj = 1.074805814e+04 infeas = 5.185e+09 (0) Warning: numerical instability (primal simplex, phase I) 3122: obj = 1.998434476e+03 infeas = 3.955e+05 (0) Warning: numerical instability (primal simplex, phase I) 3159: obj = 1.998431624e+03 infeas = 3.944e+05 (0) Error: unable to factorize the basis matrix (1) Sorry, basis recovery procedure not implemented yet glp_intopt: cannot solve LP relaxation Time used: 1.7 secs Memory used: 10.8 Mb (11322915 bytes) -------------------------------------------------------------- Any insights/workarounds will be appreciated.
mi.cplex.gz
Description: GNU Zip compressed data
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