[Freeswitch-users] SIP/2.0 500 No session set by user

Hello again everyone! I'm getting a strange result when calling from a Polycom endpoint on FS server "A" to FS server "B": About one out of ten calls won't complete with the error "SIP/2.0 500 No session set by user". If I immediately redial the number again it works. Here's my log: http://pastebin.freeswitch.org/17622 Note the response to the endpoint from server "A" on line 452. Important IP addresses: Polycom endpoint: 10.15.100.250 Server "A": 10.15.100.20 Server "B": 10.15.100.10 I'm on the latest revision (git-2f786a0 2011-10-26 12-57-59 -0500) as well. I appreciate your help. ~Brian