Improved solution summary of the Optimization Engine on user abort

In case of a user abort, the final message of the Optimization Engine summarizing the optimization result does not consistently report that the optimization has been aborted. With this release, the Optimization Engine reports that the optimization has been aborted by user when a user aborts the optimization, typically for a discrete or a continuous problem.

Note: By default this feature is enabled. A new role or privilege is not required to access this feature.