The Problem Pointer

The Optimizer provides a container or problem pointer to contain an optimization problem and its associated controls, attributes and any other resources the user may attach to help construct and solve the problem. Console Optimizer has one of these problem pointers that it uses to provide the user with loading and solving functionality. This problem pointer is automatically initialized when Console Optimizer is started and release again when it is stopped.

In contrast to Console Optimizer, library interface users can have multiple problem pointers coexisting simultaneously in a process. The library user creates and destroys a problem pointer using the routines XPRScreateprob and XPRSdestroyprob, respectively. In the C library interface, the user passes the problem pointer as the first argument in routines that are used to operate on the problem pointer's data. Note that it is recommended that the library user destroys all problem pointers before calling XPRSfree.

{
  XPRSprob prob;
  XPRScreateprob(&prob);
  XPRSdestroyprob(prob);
}