If you run another model, (or open additional results from the Results program), then STEM will ask whether the current workspace should be closed.
Closing the current workspace
If you choose Yes
to load the new results separately, then STEM will prompt to save the current workspace, if it has been modified, prior to loading or creating a new workspace for the new model as described above.
Alternatively, if you elect to work with several models, the Results program will prompt for a new name when the workspace is next saved. You may wish to choose a name more indicative of the status of the extended workspace, and in particular to avoid the other models being loaded when the original model is run in isolation in a future session.
See also 5.2.6 Working with multiple models.