acceptor session

Imported from previous forum

while running the fixengin, i am always getting error that “acceptor session not defined”

i am running c++ code from commond prompt like

at -f my

where at is fixcode executeble and my is containg the declaration of sessions

my file sample is

[DEFAULT]
ConnectionType=initiator
ReconnectInterval=60
SenderCompID=TW

session definition

[SESSION]

inherit ConnectionType, ReconnectInterval and SenderCompID from default

BeginString=FIX.4.1
TargetCompID=ARCA
StartTime=12:30:00
EndTime=23:30:00
HeartBtInt=20
SocketConnectPort=9823
SocketConnectHost=123.123.123.123
DataDictionary=somewhere/FIX41.xml

[SESSION]
BeginString=FIX.4.0
TargetCompID=ISLD
StartTime=12:00:00
EndTime=23:00:00
HeartBtInt=30
SocketConnectPort=8323
SocketConnectHost=23.23.23.23
DataDictionary=somewhere/FIX40.xml

[SESSION]
BeginString=FIX.4.2
TargetCompID=INCA
StartTime=12:30:00
EndTime=21:30:00

overide default setting for RecconnectInterval

ReconnectInterval=30
HeartBtInt=30
SocketConnectPort=6523
SocketConnectHost=3.3.3.3

(optional) alternate connection ports and hosts to cycle through on failover

SocketConnectPort1=8392
SocketConnectHost1=8.8.8.8
SocketConnectPort2=2932
SocketConnectHost2=12.12.12.12
DataDictionary=somewhere/FIX42.xml

still i am getting error that “acceptor session not defined”.

can somebody help me?

thank you