NOTICE DATE:  November 1, 2012

NOTICE TYPE:  M-C110112-01 INITIAL: Maintenance Outage – Retail/Wholesale

SHORT DESCRIPTION:  Scheduled Maintenance Outage

INTENDED AUDIENCE:  All Market Participants

DAY AFFECTED:  Sunday, November 11, 2012 from 06:00 through 21:00

LONG DESCRIPTION:  ERCOT has scheduled a maintenance outage for Sunday, November 11, 2012 from 06:00 through 21:00.

ADDITIONAL INFORMATION:  During the outage the following functions will be affected:

• Market Participants utilizing NAESB to send/receive transactions to/from ERCOT will NOT be able to send/receive transactions to/from ERCOT during the outage. This includes all retail transactions.
• 867 transactions will NOT be forwarded during the outage.
• 997 Functional Acknowledgements will NOT be sent during the outage.
• MarkeTrak will be unavailable for the duration of the outage.

• Retail Application components of the MIS and the Retail API will NOT be available

• Retail Reports and Extracts may be impacted during the outage timeframe
• eService application will be unavailable on the Market Information System (MIS)

• MPIM will be unavailable for the duration of the outage.

CONTACT:  If you have any questions, please contact your ERCOT Account Manager.  You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via e-mail at [log in to unmask].

If you are receiving e-mail from an ERCOT distribution list that you no longer wish to receive, please follow this link in order to unsubscribe from this list: http://lists.ercot.com.

DH/CD

402493