NOTICE DATE:  February 24, 2011
NOTICE TYPE:  M-A022411-01 INITIAL:  Maintenance Outage - Retail/Wholesale
SHORT DESCRIPTION:  Scheduled Maintenance Outage
INTENDED AUDIENCE:  All Market Participants
DAY AFFECTED:  Sunday, March 6, 2011 from 06:00 through 21:00
LONG DESCRIPTION:  ERCOT has scheduled a maintenance outage for Sunday, March 6, 2011 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.
 *   Components of the TML and Commercial API will NOT be available including:
    *   Find ESI ID
    *   Find Transaction
    *   Submit Transactions
    *   USA Functionalities
    *   Report Explorer, including
       *   Reports
       *   Extracts
       *   Invoices
       *   Settlement Statements
    *   Extract Scheduler
    *   Web Services Data Requests

 *   ERCOT Internet Services will NOT be available, including but not limited to:
    *   ERCOT.com - www.ercot.com<http://www.ercot.com>
    *   MarkeTrak - https://marketrak.ercot.com:8443/tmtrack.dll
    *   TCR - https://tcr.ercot.com<https://tcr.ercot.com/>
    *   Texas Renewables - www.texasrenewables.com<http://www.texasrenewables.com/>
 *   Components of the MIS will NOT be available including:
    *   Retail Applications


 *   Components of the MIS will intermittently NOT be available including:
    *   Downloading of extracts and reports


 *   Components of the External Web Services (EWS) will intermittently NOT be available including:
    *   GetReport

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]<mailto:[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<http://lists.ercot.com/>.

JR/DP
211907


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