> I just found another problem about GLPK lp reader (version 4.52.1). > > I use CPLEX converted the '25FV47' problem in netlip from mps to lp > and there are empty constraints. But I cannot read the lp file using > GLPK lp reader as it complains 'missing variable name' (as you know an > empty constraint does not have any variables). > > Could this be changed in the future? Thanks. >
Disagree. The cplex lp format routine works correctly: GLPSOL: GLPK LP/MIP Solver, v4.53 Parameter(s) specified in the command line: 25fv47.mps --wlp 25fv47.lp --check Reading problem data from `25fv47.mps'... Problem: 25FV47 Objective: R0000 One free row was removed 821 rows, 1571 columns, 10400 non-zeros 6919 records were read Writing problem data to '25fv47.lp'... 2504 lines were written GLPSOL: GLPK LP/MIP Solver, v4.53 Parameter(s) specified in the command line: --lp 25fv47.lp --check Reading problem data from '25fv47.lp'... 821 rows, 1571 columns, 10400 non-zeros 2504 lines were read In particular, an empty row named 'F1X.0' appears in the lp file as follows: Subject To F1X.0: 0 MSEXP = 0 so glp_read_lp is able to correctly read back the lp file. _______________________________________________ Bug-glpk mailing list [email protected] https://lists.gnu.org/mailman/listinfo/bug-glpk
