NOTICE DATE:  April 27, 2012
NOTICE TYPE:  M-A042712-01 INITIAL:  Maintenance Outage  Retail/Wholesale
SHORT DESCRIPTION:  Scheduled Maintenance Outage
INTENDED AUDIENCE:  All Market Participants
DAY AFFECTED:  Sunday, May 6, 2012 from 06:00 through 21:00
LONG DESCRIPTION:  ERCOT has scheduled a maintenance outage for Sunday, May 6, 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 Renewables<>
  *   Retail Application components of the MIS will NOT be available.
  *   Components of the MIS will intermittently NOT be available including:
     *   Access to Dashboards
     *   Downloading of extracts and reports
     *   Access to Applications

         Market Manager (MMUI), and Outage Scheduler (OSUI) will need to be accessed via the following URLs:


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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