The top-level object in an Analytica (*.ana) file may be a Model object, a Linked Module oblect, or a Linked Library object. Linked Modules and Linked Libraries are meant to be imported into models and re-used, while a Model is intended to serve as the top-level object. Model files differ from linked module or linked library files in that in addition to storing the module and contained objects, the Model file also stores system variables (such as Time and SampleSize) and preferences.

If you use Add Module... to add a Model file to an existing model, the system variable settings (Time, SampleSize, and preferences) that are in that file are normally read from the file and replace the current settings.

In Analytica 4.2.2 and later, you will be asked:

Answering Yes reads in the system variable settings from the imported file, answering no leaves your current system variable settings in tact.

If you are linking (rather than embedding), the model will remember your answer. However, beware that a linked file may be saved if it is dirtied in any way, thus causing the system variables in the file to be replaced.

In general, if you intend a file to be shared between models, don't use a Model class. Change the class of the top-level object to LinkModule or LinkLibrary.

Using Add Module... to import a Model file

See Also