Whenever you invoke a model run the Run Monitor window will be displayed automatically.
The image above shows two Scenarios in the Run Monitor window with Multiprocessing disabled. As you can see, the model run for Scenario 1 is complete and as a result the Run Log link is enabled. The other Scenario is still running.
You can cancel the run for an individual Scenario by clicking the Scenario's Cancel button. You can also cancel all of the current Scenario runs by clicking the Cancel button in the column header cell (to the right of the Status column header.)
Depending on the type of the model, it make take several seconds or even minutes to cancel a Scenario, especially when Multiprocessing is disabled.
When Multiprocessing is enabled the Run Monitor has a different appearance.
The image above shows the Run Monitor with two Scenarios running and Multiprocessing enabled.