This menu item can be found by selecting Scenario Analysis from the Main Menu followed by the Run sub-option.
Use this IFs option if you would like to take your Working File and convert it into a Run-Result-Files. If you have changed parameters in your scenario tree, or you have loaded a previously structured scenario, select the Single-Run option under Scenario Analysis on the Main Menu of IFs.
This is not the most common way for users to create Run-Result-Files. Typically, these files are created through the Quick Scenario Tree.
This feature of IFs is also used after Rebuilding the Base.
After you have selected this option you will be prompted by a screen where you can specify for how many years IFs should run. Choose the year you would like the run to stop and then click Start Run.