search for: infeas

...s = NULL, max = FALSE, bounds = c(-100,100), verbose = TRUE) The R output says there is no feasible solution, but e.g. (-2.3756786, 0.3297676, 2.0459110, 2.3756786) is feasible. The output is "GLPK Simplex Optimizer, v4.42 9 rows, 4 columns, 19 non-zeros 0: obj = 0.000000000e+000 infeas = 1.000e+000 (2) PROBLEM HAS NO FEASIBLE SOLUTION" One other thing, a possible bug - if I run this code with "dir" shorter than it should be, R crashes. My version of R is 2.131.56322.0, and I'm running it on Windows 7. Regards, Gareth

...;- Rglpk_solve_LP(obj, mat, dir, rhs, types = NULL, max = FALSE, bounds = c(-5,5), verbose = TRUE) ........................................................................... The output is " GLPK Simplex Optimizer, v4.42 203 rows, 101 columns, 601 non-zeros 0: obj = 0.000000000e+000 infeas = 1.000e+000 (2) 4: obj = 0.000000000e+000 infeas = 1.000e+000 (1) PROBLEM HAS NO FEASIBLE SOLUTION " I have also tried setting the problem up with a small interval around the equality constraints rather than having strict equalities, but could not get the correct solution this way ei...