ILOG CPLEX 11.0 Parameters Reference Manual > > Alphabetic List of Parameters > Feasibility tolerance for network primal optimization

C Name

CPX_PARAM_NETEPRHS

C++ Name

NetEpRHS

Java Name

NetEpRHS

.NET Name

NetEpRHS

InteractiveOptimizer

network tolerances feasibility

Identifier

5003

Description

Specifies feasibility tolerance for network primal optimization. The feasibility tolerance specifies the degree to which the flow value of a model may violate its bounds. This tolerance influences the selection of an optimal basis and can be reset to a higher value when a problem is having difficulty maintaining feasibility during optimization. You may also wish to lower this tolerance after finding an optimal solution if there is any doubt that the solution is truly optimal. If the feasibility tolerance is set too low, CPLEX may falsely conclude that a problem is infeasible. If you encounter reports of infeasibility during Phase II of the optimization, a small adjustment in the feasibility tolerance may improve performance.

Values

Any number from 1e-11 to 1e-1; default: 1e-6.