Identify problems

Hi,
basically, my script calls to a number and reads emails to him, then records his reply. the problem I start to have since yesterday is that the callee simply heard nothing, but the recordings are successful. When I checked the log, two kind of warning/error messages:
*“Re-invite to non-existing call leg on other UA”
*"Comfort noise support incomplete in Asterisk"
my questions are:
which is connected to the problem?
and of couse how to solve it?

(my sip.conf has canreinvite=no)
thanks in advance!

a reinstallation solved the problem. seems to be a file corruption problem.