[Serusers] ser error

Hi, I encounter the following error message when running ser 0.8.14 and rtpproxy ( nathelper enable). Dec 17 12:55:16 officehk123 /usr/local/sbin/ser[7930]: ERROR: extract_body: message body has lenght zero Dec 17 12:55:16 officehk123 /usr/local/sbin/ser[7930]: ERROR: force_rtp_proxy2: can't extract body from the message Dec 17 12:55:16 officehk123 /usr/local/sbin/ser[7930]: ERROR: on_reply processing failed Dec 17 13:01:30 officehk123 /usr/local/sbin/ser[7930]: ERROR: extract_body: message body has lenght zero Dec 17 13:01:30 officehk123 /usr/local/sbin/ser[7930]: ERROR: force_rtp_proxy2: can't extract body from the message Dec 17 13:01:30 officehk123 /usr/local/sbin/ser[7930]: ERROR: on_reply processing failed Dec 17 13:02:31 officehk123 /usr/local/sbin/ser[7949]: ERROR: open_reply_pipe: open error (/tmp/ser_receiver_8025): No such file or directory Dec 17 13:02:31 officehk123 /usr/local/sbin/ser[7949]: ERROR: fifo_reply: no reply pipe /tmp/ser_receiver_8025 Is this a serious problem ? Do I need to solve it? Hope someone can answer me pls. Thomas