Writing basis files

The Interactive Optimizer supports the option to write basis files.

Another optional file format is BAS. Unlike the LP and MPS formats, this format is not used to store a description of the problem statement. Rather, it is used to store information about the solution to a problem, information known as a basis. Even after changes are made to the problem, using a prior basis to start the optimization from an advanced basis can speed solution time considerably. A basis can be written only after a problem has been solved. Try this now with the following command:

write example.bas 

In response, CPLEX displays a confirmation message, like this:

Basis written to file 'example.bas'.