developers:fixapi.logout [WIKI]

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==== Logout ====

===== Session Termination =====

The Logout message requests or indicates the termination of a FIX session. The logout initiator should wait for a response and/or confirmation to the logout condition. This will permit the counterparty to gently close its connection and honor a potential message gap-fill.

If the T4 FIX API server initiates a Logout, an issuing physical disconnection will follow. When possible, the T4 FIX API will provide information on the nature or cause of the termination. If the client sends a Logout message, no more messages should be sent by the client.

Under normal operating conditions, the client requests a logout and the T4 FIX API server honors the request. A physical disconnection without an exchange of Logout messages is considered an abnormal condition.

===== Failed Authentication =====

To start a new FIX session, the T4 FIX API will need to reach successful authentication of the client's Logon message. To provide as much information as possible, a failed authentication is responded (by the T4 FIX API) with a Logout message.

A new FIX session (with sequence numbers reset to 1) will be required after the receipt of a Logout message and its subsequent physical disconnection.

===== Message Dictionary =====

^ Tag             ^ Field Name       ^ Req'd  ^ Comments                                  ^
| (Standard Header) | Y               | MsgType = 5                               |
| 58              | Text             | N      | Free format text string. Contains information related to the cause of the logout. |
| (Standard Trailer) | Y               |                                           |

===== Sample Message =====

Client request to logout:

<code>
34=2|49=CTS|56=T4Example|52=20120904-22:13:57.789|
</code>

<code>
[FIXLOGOUT]  
[MsgSeqNum] 34 = 2  
[SenderCompID] 49 = CTS  
[TargetCompID] 56 = T4Example  
[SendingTime] 52 = 20120904-22:13:57.789  
</code>

Server Response:

<code>
34=2|49=T4Example|56=CTS|50=T4FIX|52=20120904-22:13:57.789|58=Successful logout upon request|
</code>

<code>
[FIXLOGOUT]  
[MsgSeqNum] 34 = 2  
[SenderCompID] 49 = T4Example  
[TargetCompID] 56 = CTS  
[SenderSubID] 50 = T4FIX  
[SendingTime] 52 = 20120904-22:13:57.789  
[Text] 58 = Successful logout upon request  
</code>

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