What are the different meanings of the model statuses?

Processing Statuses

When you submit a model, it passes through several processing steps.

Queued

This status can mean one of two things:

1. Rose is settings up the number of nodes you requested. This may take up to a minute if you have not run any models recently.
2. You are at your organization's limit for the number of concurrent solves. To increase this limit, reach out to us.

Solving

The model is being processed and the Rose solver is working on a solution

Successful Statuses

Once a problem has finished solving, several outcomes are possible.

Optimal

The model has been solved to optimality, within the defined tolerances. The optimal solution, which meets all specified constraints and achieves the best possible objective value, is available for download. To change or view the tolerances, see this article for how to How to change and view the solver parameters.

Feasible

The Rose solver found a feasible solution but stopped before reaching optimality. This can happen for one of two reasons:

1. The user-specified timeout limit was reached.
2. A user manually stopped the solve before Rose could complete.

In both cases, Rose will return the best solution it has found so far. You can find the exact reason for why Rose stopped in the web interface on the page for a specific solve, just under the objective value.

Unbounded

The model has been determined to be unbounded, meaning that the objective function can improve indefinitely without violating any constraints. In other words, the objective value is positive infinity for a maximization problem and negative infinity for a minimization problem. This means that at least one of the decision values is going to either positive or negative infinity. In such cases, no finite optimal solution exists, and the model's formulation may need to be reviewed.

Note that this model may still have a feasible solution. If you want to see if a feasible solution exists, set the objective value to zero and resubmit the problem.

Infeasible

The model is deemed infeasible when no solution exists that satisfies all of the imposed constraints. This means that there is no possible combination of values for the decision variables that can meet the requirements set by the constraints, and therefore, no valid solution exists.

Infeasible or Unbounded

The model is either infeasible or unbounded, as defined above. Rose did not perform additional analysis to determine which of these cases applies.

Cancelled

A user has manually stopped the solver during a run.

No Result Statuses

Timeout

The user-specified timeout limit was reached before Rose could find any feasible solutions.

Cancelled

The solve was manually stopped by the user before Rose could find any feasible solutions.

Error

An unexpected issue occurred somewhere in the process. This error may result from incorrect input data, a misconfiguration in the model settings, or an internal problem within the solver. Please review your inputs and settings, and if the problem persists, please let us know about it, we can help. Clicking "show more" on the model solution page will also open the drawer and show the specific error message. Please provide this error message upon reaching out for support.