ocserv accounting problem

[Teki Ri]

Hello,

My freeradius server couldn't receive any accounting data from ocserv,
I've tried 0.9.2, 0.10.0 and the latest 0.10.1, I found the following
messages from debug log maybe related but no idea on how to fix it:
...
ocserv[24358]: sec-mod: cmd [size=58] sm: cli stats
ocserv[24358]: sec-mod: session stats but with non-existing sid!
ocserv[24358]: sec-mod: error processing data for 'sm: cli stats' command (-1)
...

I also created a small script to output STATS_BYTES_IN,
STATS_BYTES_OUT into a file when disconnect, the value of them are
always 0.

How can I fix this problem?

Thanks,
David