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This is an advanced routine. Advanced routines typically demand a thorough understanding of the algorithms used by ILOG CPLEX. Thus they incur a higher risk of incorrect behavior in your application, behavior that can be difficult to debug. Therefore, ILOG encourages you to consider carefully whether you can accomplish the same task by means of other Callable Library routines instead.
The routine CPXfreelazyconstraints is used to clear the
 list of lazy constraints that have been previously specified through calls
 to CPXaddlazyconstraints.
Example
status = CPXfreelazyconstraints (env, lp);
| env | A pointer to the CPLEX environment, as returned by   | 
| lp | A pointer to a CPLEX LP problem object, as returned by   |