NOTICE DATE:  February 23, 2012
NOTICE TYPE:  M-A022312-01 INITIAL: Maintenance Outage  Retail/Wholesale
SHORT DESCRIPTION:  Scheduled Maintenance Outage
INTENDED AUDIENCE:  All Market Participants
DAY AFFECTED:  Sunday, March 4, 2012 from 06:00 through 21:00
LONG DESCRIPTION:  ERCOT has scheduled a maintenance outage for Sunday, March 4, 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.

  *   ERCOT Internet Services may be intermittently unavailable, including but not limited to:
     *   MarkeTrak -
     *   Texas Renewable<>
  *   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

  *   Report download Components of the External Web Services (EWS), Market Manager (MMUI), Outage Scheduler (OSUI) will intermittently NOT be available.
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]>.
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