Information in Math Program Inspector

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erica ye

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Apr 12, 2012, 6:24:11 PM4/12/12

to AIMMS - The Modeling System

I have 'Model status: Locally optimal' & 'Objective: 2.08' in 'Math
Program Solution' tab.
But there are also 'Bound violation' in variable solution tab and
"violated" flag in Bound Status column in Constraint solution tab.

I don't understand if the problem is feasible, why there are
violation?
And the values in Math Program Inspector are different from the Data
Page of the variable.
Those values in Data Page seem to be the feasible solution to the
problem.

Thank you so much.

Guido Diepen

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Apr 13, 2012, 3:30:58 AM4/13/12

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Hi Erica,

I don't have a clear answer why the data is different. Do you mean that the variable level values are completely different? Are you only running one solve statement, or do you have multiple math programs?

Regarding the violated flag, which version of AIMMS are you using? In versions of AIMMS prior to 3.11 PR - SU2 / SU3, it could happen that the bound tolerance used by the solver was different than the bound tolerance used within the Math Program Inspector. Please see the help for the options MPI_bound_tolerance and MPI_feasibility_tolerance for more information.

Guido Diepen