NOTICE DATE:  August 26, 2009

NOTICE TYPE:  M-A082609-01 Release - Retail

SHORT DESCRIPTION:  ERCOT has an on-cycle retail release planned for 12:00 PM Saturday, September 26, 2009 through 12:00 AM Monday, September 28, 2009.

INTENDED AUDIENCE:  All Market Participants

DAY AFFECTED:  12:00 PM Saturday, September 26, 2009 through 12:00 AM Monday, September 28, 2009.

LONG DESCRIPTION:  ERCOT has an on-cycle retail release scheduled from 12:00 PM Saturday, September 26, 2009 through 12:00 AM Monday, September 28, 2009.

For reference, SIRs to be implemented on this release are included in the attachment.

The following projects will be implemented during this release:

PR80031_01 - Retail Application Upgrades

PR50061_01 EDI server and NAESB Transition to ISM

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

· MarkeTrak - https://marketrak.ercot.com:8443/tmtrack.dll

· TCR - https://tcr.ercot.com

· Texas Renewables – www.texasrenewables.com

MOS, Scheduling API, MOSTML, MOSPUBLIC, and Outage Scheduler will not be affected as there will be a DNS failover from Taylor to Austin.

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].

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.

JR/DP