Extension match field

John Schistos <jschistos@...>

I want to insert an extension match field of a flow.I followed the nicira project structure and "probably" figured out how to do it.The thing is, when I try to push an example flow of mine, Wireshark shows me an error of Openflow messages, saying that there is a null field, does anyone know something on this and could help me?Or if someone has done something relevant he/she could help me?