> I currently have GLPK 4.9 installed and the following CPLEX file: > maximize 1 > st > - 2 x1 - 3 x2 <= -1 > 2 x1 + 3 x2 <= 1 > - 1 x1 - 1 x2 <= -4 > 1 x1 + 1 x2 <= 4 > bounds > x1 free > x2 free > end > > Cplex can read it. > glpsolve: > $ glpsol --cpxlp test.lp > lpx_read_cpxlp: reading problem data from `test.lp'... > test.lp:2: missing variable name > CPLEX LP file processing error > > > Why?
Because there is a syntax error in maximize statement. Note that glpk does not support some features allowed in recent versions of cplex format, in particular, constant terms in the objective. For details about compatibility please consult the glpk reference manual (Appendix C "CPLEX LP Format", pp.79-84). If you need only a feasible solution, simply specify any variable as the objective, for example: maximize x1 _______________________________________________ Help-glpk mailing list Help-glpk@gnu.org http://lists.gnu.org/mailman/listinfo/help-glpk
