We are doing an upgrade from Z stack 2.3.1 to 2.5.0 and find the problem. When we use MT command enabled coordinator modified from Z stack 2.5.0 GenericApp, we find we can not receive any AF_INCOMING_MESSAGE in Z-tool after an end node announcement. However, the same experiment works well on Z stack 2.3.1. By the way, we use the following code in end device to send AF data and expect to receive AF_INCOMING_MESSAGE on coordinator side. We have used sniffer to confirm that AF message is sent out from end device. Could you help to verify if there is any problem in Z stack 2.5.0?