[asterisk-users] chanstats console errors

[asterisk-02 at jeremykister.com]

Running Asterisk 10.12.2 on Debian/sparc

i'm doing all sip/rtp.
directmedia=yes
directrtpsetup=yes


I frequently see on the console:
WARNING[7832]: chan_sip.c:19134 show_chanstats_cb: Could not get RTP stats

What is this error trying to tell me ?  'sip show channelstats' shows 
all 0s (save Peer/CallID/Duration)


I looked for that string in the source but i didnt learn much.