Originally posted by: SystemAdmin

[frances said:]

    Hi,
    The 1st problem:
                            My model can be solved correctly. I got the optimal solution,but can not get the dual values.
                            The error showed is 1217: no solution exists.

    The 2nd problem:

                model (1):
                            Max: x[0]+4*x[2]

                            st.:  -2*x[0]+3*x[1]<=3<br />                                    x[0]+2*x[1]<=8<br />                                    x[0]>=0,integer; x[1]>=0,integer
                         
                            The solution obtained is (0,0). it is not correct.

              model (1):

                            Max: x[0]+4*x[2]

                            st.:  -2*x[0]+3*x[1]<=3<br />                                    x[0]+2*x[1]<=8<br />                                    x[0]>=0,integer; x[1]>=0,integer
                                    x[0]<=100; x[1]<=100<br />                         
                            I just tighten the constraint, and the solution obtained is (4,2). It is correct.
                           
                            WHY?


                         
#CPLEXOptimizers
#DecisionOptimization

Originally posted by: SystemAdmin

[vblanchard said:]

what version are you working with?
I just tried with OPL 6.1 (which uses CPLEX 11.2) and it gives the expected result.
#CPLEXOptimizers
#DecisionOptimization