Hello,
please update the documentation site for prvQueueUnregisterQueue http://www.freertos.org/vQueueUnregisterQueue.html . The function prvQueueUnregisterQueue is no more public (7.4.0) and is called during deletion of a queue by default if configQUEUE_REGISTRY_SIZE > 0. Best
Martin

Thanks for pointing this out.  I will either make the function public or update the documentation as appropriate. Regards.