Hello, There could be many reasons for this. One possible reason might be that you only added a
const static packet_t ….. for your new packet type in packet.h and after compiled your ns-2 code using "make" command. However,the "make" command will not take into account the changes that are only made in ".h" files. In the in this case, you need to do a small change, for example add or remove a commented line in your packet.cc and save it and execute the "make" command again. For more info you can see this link: https://wiki.ti5.tu-harburg.de/wsn/ns2/packet But your problem could have other reasons. Best regards, -- View this message in context: http://network-simulator-ns-2.7690.n7.nabble.com/Packet-header-of-application-layer-protocol-tp27252p27254.html Sent from the ns-users mailing list archive at Nabble.com.