When omp_set_max_active_levels() is called from within an active parallel region, then the call is ignored. A warning message is issued if SUNW_MP_WARN is set to TRUE or a callback function is registered by a call to sunw_mp_register_warn().
If the argument to omp_set_max_active_levels() is not a non-negative integer, then the call is ignored. A warning message is issued if SUNW_MP_WARN is set to TRUE or a callback function is registered by a call to sunw_mp_register_warn().