If you supply an optional file name, such as modelfile, that file contains a list of files, one file name per line. Each file contains a model to tune. Each file must specify its type, such as .mps, .lp, or .sav, as the extension in the file name. Optionally, those cited files may be compressed, as specified by the extension .gz or .bz2. Here is an example of the contents of such a file, specifying three compressed files of type .mps available in the current working directory:

p0033.mps.gz
p0548.mps.gz
p2756.mps.gz

For models not in the current working directory, you can specify a path to them with the usual syntax for your platform.

ILOG CPLEX will uncompress the model files, read them according to their type of format, and apply the tuning tool to that suite of files. If you do not specify a list of models to tune, then ILOG CPLEX tunes the model currently in the Interactive Optimizer.