Error Messages/40558

Error Message Text

Internal Frontline Solver error: During Function LpObjSa, the objective coefficient lower/upper dual values are not available.

In function OptObjectiveSa, the objective coefficient lower/upper dual values are not available. In general, these are only available for a continuous linear program, and not available when you have integer variables or a nonlinear objective or constraint.

Cause

Theoretically, you should never see this error. However, we have found that it will appear if you attempt to evaluate LpObjSa(..) on an integer linear programming problem. In that case, a more graceful error message ought to appear, such as "LpObjSa can only be used on a continuous LP -- your LP contains integer decision variables", or something to that effect.

If you think you are seeing this is any other situation, please send us a model (to support@lumina.com) that reproduces the problem and we'll take a look at it.

See Also

• LpObjSa