NOTICE DATE:  April 5, 2012

NOTICE TYPE:  M-B040512-01 INITIAL:  Maintenance Outage Retail/Wholesale

SHORT DESCRIPTION:  Scheduled Maintenance Outage

INTENDED AUDIENCE:  All Market Participants

DAY AFFECTED:  Sunday, April 15, 2012 from 06:00 through 21:00

LONG DESCRIPTION:  ERCOT has scheduled a maintenance outage for Sunday, April 15, 2012 from 06:00 through 21:00.

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


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




         Components on will intermittently NOT be available including:


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].

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