getting_started.rst

Configure model files

By default, the GAMS files containing the mathematical model core are installed with message_ix (e.g., in your Python site-packages directory). Many users will simply want to run , or use the Python or R APIs to manipulate data, parameters and scenarios. For these uses, direct editing of the GAMS files is not necessary.

To edit the files directly—to change the mathematical formulation, such as adding new types of parameters, constraints, etc.—use the messageix-config utility to place the model files in a directory of your choice:

$ messageix-config --model_path /path/to/model

Note

If you installed from source on Windows using install.bat, this command was run automatically, pointing to message_ix/model.