Documentation

Releasing shared resources

In most of the previous examples, an environment is using a shared resource (e.g., a token license, a remote machine, etc.), and as long as the environment persists in memory, these resources remain locked, and unavailable to other users.

To give back these shared resources you need to dispose of any model associated with the environment, and then you need to dispose of the environment itself.

The actual steps depend on the API you are using:

C

Call GRBfreemodel() for each model, then call GRBfreeenv() for the Gurobi environment. For the previous example, it would look like:

QUIT:
  /* Clean up model and environment */
  GRBfreemodel(model);
  GRBfreeenv(env);
  return error;

C++

If you use pointers to GRBModel and GRBEnv objects, delete all GRBModel objects, then delete the GRBEnv object.

Java

Call GRBModel.dispose() on all GRBModel objects, then call GRBEnv.dispose() on the GRBEnv object. For the previous example, it would look like:

  // Clean up model and environment
  model.dispose()
  env.dispose()

.NET

Call GRBModel.Dispose() on all GRBModel objects, then call GRBEnv.Dispose() on the GRBEnv object.

Python

Call Model.dispose() on all Model objects, Env.dispose() on all Env objects (if used), then call disposeDefaultEnv(). For the previous example, it would look like:

# Clean up model and environment
model.dispose()
env.dispose()
gp.disposeDefaultEnv()