Using environment variables in CPLEX

CPLEX uses environment variables.

If your operating system supports environment variables, CPLEX can make use of certain of them. You set the value of such environment variables according to the usual conventions of your operating system or platform.

For example, when you create a file of CPLEX parameter settings, as explained in Saving parameter settings to a file in the C API, CPLEX recognizes the location of that parameter file by means of the environment variable ILOG_CPLEX_PARAMETER_FILE. Moreover, CPLEX reads the contents of that PRM file and applies the parameter settings accordingly.