[Freeswitch-users] sip_history_info value

Hi, I have FS 1.2.14 running and I'm testing it's behaviour in call forwarding scenarios. I'd like to include the SIP History-Info-Header as per RFC 4244 in forwarded calls, so I guess the sip_history_info channel variable should hold this data. However, when I show its contents in the fs_cli debugs by using the log action in the relevant part of the dialplan with: <action application="log" data="LOG SIP History info is '${sip_history_info}'"/> it appears to be empty: [DEBUG] mod_dptools.c:1595 Says SIP History info is '' Any clues as to how this variable should be used ? Thanks in advance, Giuseppe