This method is the general entry point for writing optimization data to a file. It can be used to write optimization models, solutions vectors, basis vectors, start vectors, or parameter settings. The type of data written is determined by the file suffix. File formats are described in the File Format section.
Note that writing a model to a file will process all pending model modifications. However, writing other model information (solutions, bases, etc.) will not.
filename: The name of the file to be written. The file type is encoded in the file name suffix. Valid suffixes are .mps, .rew, .lp, or .rlp for writing the model itself, .ilp for writing just the IIS associated with an infeasible model (see GRBModel.ComputeIIS for further information), .sol for writing the current solution, .mst for writing a start vector, .hnt for writing a hint file, .bas for writing an LP basis, or .prm for writing modified parameter settings. If your system provides compressing utilities (e.g., 7z or zip for Windows, and gzip, bzip2, or unzip for Linux or Mac OS); then the files can be compressed, so additional suffixes of .gz, .bz2, or .7z are accepted.