Saving models

When you save a model, the model's information is saved in two separate files: a model file (.ITMX or .STMX) and a database file (.ISDB).

• The model file (.ITMX or .STMX) contains the information that defines the model, such as its entities, equations, interface objects, documentation, and page layout information.
• The database file (.ISDB) contains the simulation run data for the model, if any.

Note: If you share your model by sending the model file to someone else and you want to include the model's simulation run data, you also need to send the database (.ISDB) file. For more information about the files you need to include when you share your models, see Distributing models to users.

To save a model

1. From the File menu, choose Save.

   If you have already saved this model before, iThink/STELLA saves the changes to your model in the same model and database files.

   If you have never saved this model before, the Save File As dialog box opens.

   If you are saving a model that was converted from an older version of iThink/STELLA when you opened it, the Save File As dialog box opens.

2. Specify the location and name for the model file.

3. Click Save.

   The model file is saved with the name and to the location you specified.

   If there are saved runs for the model, a database file is also saved to the location you specified, with the same name as the model file.

   Note: If you are saving a model created with a version of iThink or STELLA that is older than Version 10, the model will be saved with the new .ITMX or .STMX extension. You cannot save a model as an earlier version.

To make a copy of a model

Use the Save As command to save a copy of the currently open model as a new model.

1. From the File menu, choose Save As.

   The Save File As dialog box opens.

2. Specify the location and name for the new model file.

3. Click Save.

   The new model file is saved with the name and to the location you specified.

   If there are saved runs for the model, a database file is also saved to the location you specified, with the same name as the model file.

   Note: If you are saving a model created with a version of iThink or STELLA that is older than Version 10, the model will be saved with the new .ITMX or .STMX extension. You cannot save a model as an earlier version.

See Also