NOTICE DATE: August 29, 2013

NOTICE TYPE: M-A082913-01 Release – Retail

SHORT DESCRIPTION:  ERCOT has an on-cycle Retail Release planned for 12:00 Saturday**, September 28, 2013 through 00:00 Monday, September 29, 2013

**Please note due to operational requirements this Release will begin earlier than the standard Release Window which normally begins at 5:00PM.

INTENDED AUDIENCE:  ERCOT Market Participants

DAYS AFFECTED:  ERCOT has an on-cycle Retail Release planned for 12:00 Saturday, September 28, 2013 through 00:00 Monday, September 29, 2013.

LONG DESCRIPTION:  ERCOT has an on-cycle Retail Release planned for 12:00 Saturday, September 28, 2013 through 00:00 Monday, September 29, 2013.

ADDITIONAL INFORMATION:  During this 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
• 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 components of the MIS and the Retail API will not be available
• MPIM will not be available
• eService application will be unavailable on the Market Information System (MIS)

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 email at [log in to unmask].

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dg