Hi there are command for investigate this issue , go to session already exixsts and dropped it ?
Log Number: 3056
Date: 2012/Oct/29
Time: 16:28:26
Source: MSGMH
Description: Open MID:8782b539 CID: 782b03e MSGConnection[CID:71f8fb8] already exists, OpenTxNack to CCC.
File Name and Line Number: MSGNegotiator.cpp;367