Run script for MESSAGEix (stand-alone)

This is MESSAGEix version 3.9.0. The version number must match the version number of the ixmp MESSAGE-scheme specifications used for exporting data and importing results.

This file contains the workflow of a MESSAGEix-standalone run. It can be called:

Via the scientific programming API’s using the packages/libraries ixmp and message_ix, calling the method solve() of the message_ix.Scenario class (see the tutorials).
using the file MESSAGE_master.gms with the option $SETGLOBAL macromode "none", where the input data file name and other options are stated explicitly, or
directly from the command line, with the input data file name and other options specific as command line parameters, e.g.:
```
``gams MESSAGE_run.gms --in="<data-file>" [--out="<output-file>"]``
```

By default, the data file (in gdx format) should be located in the model/data folder and be named in the format MsgData_<name>.gdx. Upon completion of the GAMS execution, a results file <output-file> will be written (or model\output\MsgOutput.gdx if --out is not provided).