TCP Window value

Hi All,

I am having difficulties getting the TCP Window value using below:

struct tcp_analysis *tcpd=NULL;

tcpd=get_tcp_conversation_data(conversation,pinfo);

tcpd->stream - This works as I get the stream index number

tcpd->fwd->window or tcpd->rev->window - This comes back with -1

Is the correct approach or am I doing something wrong?

Much appreciated.

Version 1.11.3 (SVN Rev 54962 from /trunk) Windows XP MS Visual C++ 10.0 build 40219