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For CGW, Session ID can exist on only one CGW.

For MSGW, Session IDs are shared across multiple MSGWs. Customers utilize a single Session ID, password, and port across all MSGWs.


TagNameReqTypeMax LengthDescription






Information carried on a response to convey the time (UTC) when the request was received  the outbound message was processed by the MSGW application. UTC Timestamps are sent in number of nanoseconds since Unix epoch synced to a master clock to microsecond accuracy.


All Administrative messages and the following Application messages sent from CME Globex to the client system will not include this new tag:


  • Quote Cancel Acknowledgment (tag 35-MsgType=b, Tag 9775--UnsolicitedCancelType=ABCDEF or H)
    • Only for Unsolicited Quote Cancel