[Couenne] Question about "display" the results

[njamett at uantof.cl]

Hi

I'm working with couenne and cplex as a subsolver. I found an optimal, but when I try to display the results, it shows a different solution. 

CPX0000  CPLEX Error  1217: No solution exists.
CPX0000  CPLEX Error  1217: No solution exists.
CPX0000  CPLEX Error  1217: No solution exists.
CPX0000  CPLEX Error  1217: No solution exists.
Cbc0001I Search completed - best objective -12707779302.36208, took 557444 iterations and 10274 nodes (275.85 seconds)
Cbc0032I Strong branching done 0 times (285622 iterations), fathomed 13 nodes and fixed 185 variables
Cbc0035I Maximum depth 282, 4 variables fixed on reduced cost
CPX0000  CPLEX Error  1217: No solution exists.
CPX0000  CPLEX Error  1217: No solution exists.
CPX0000  CPLEX Error  1217: No solution exists.
CPX0000  CPLEX Error  1217: No solution exists.
CPX0000
CPX0000  Iteration           Objective            In Variable           Out Variable
CPX0000       1 sI         4645.972072                    x78                    x77
CPX0000       2 sI         4645.970457                    x63                    x62
 Couenne convexifier cuts was tried 34282 times and created 845177 cuts of which 30323 were active after adding rounds of cuts

     "Finished"

couenne: Optimal

ampl: display total_income,w,vr,vs,vc,or,os,oc,nr,ns,nc,s1,s2,aj,ak;
total_income = -362.768 (best objective)

w [*,*]
:        1          2       :=
1    1250        2500
2    1250        2500
3       0           0
4     226.445    1755.75
5       0           0
6       0           0
7       0           0
8       0           0
9       0           0
10    226.445    1755.75
11     57.2661   1590.52
12      0           0
13      0           0
14      0           0

I solved the same problem using Couenne without Cplex and I got almost the same result ( total income-12E-10). I when i did the display i didn't have any problem. Do you know why I have troubles in display when I use Couenne with Cplex?

Thank you

Best regards. 

Nathalie Jamett
PhD Student 
University of Antofagasta
Chile. 




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