Control callbacks allow you to control the branch & cut search during the optimization of MIP problems. Because control callbacks intervene in the search, the presence of a control callback in an application will cause ILOG CPLEX to turn off dynamic search. Likewise, the presence of a control callback will cause ILOG CPLEX to turn off deterministic parallelism, if the application is licensed for parallelism. Control Callbacks and Dynamic Search and Control Callbacks and Deterministic Parallel Search offer more information about this point.
If you want to take advantage of dynamic search or deterministic parallelism in your application, and you see a need for a callback to report progress, consider an informational callback instead of a control callback. Informational Callbacks explains more about this alternative, which is compatible with dynamic search and with deterministic parallelism.
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