When the model is run, no error message appears.But the process window shows that the model is unbounded. The SOLVE SUMMARY in the .lst file shows that the status of the model is Unbounded, an error message appears.
**** ERRORS/WARNINGS IN LAND EQUATION
1 error(s): Unbounded non-binding equation (slack variable)
And UNBND appears in the equations.
This problem actually corresponds to the problem of non-binding feasible regions which we observed in the first sequence. It can indeed be noted that the inequality sign has been reversed, we see =g= when we should see =l=. If we change this and run the model once again, we can see that the problem has been solved.
Conclusion : Not having an error message in GAMS does not guarantee that your model is accurate.
