NOTICE DATE: March 4, 2011

NOTICE TYPE: M-A022411-02 REMINDER: Maintenance Outage – Retail/Wholesale

SHORT DESCRIPTION: Scheduled Maintenance Outage

INTENDED AUDIENCE: All Market Participants

DAY AFFECTED: Sunday, March 6, 2011 from 06:00 through 21:00

LONG DESCRIPTION: ERCOT has scheduled a maintenance outage for Sunday, March 6, 2011 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.
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

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

Components of the External Web Services (EWS) will intermittently NOT be available including:

GetReport

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.

DH/DG

211907

From: ERCOT Client Services
Sent: Thursday, February 24, 2011 9:00 AM
To: [log in to unmask]; [log in to unmask]; [log in to unmask]; [log in to unmask]; [log in to unmask]; [log in to unmask]; [log in to unmask]
Cc: [log in to unmask]; [log in to unmask]; [log in to unmask]; 1 ERCOT Client Service Reps
Subject: M-A022411-01 INITIAL: Maintenance Outage - Retail/Wholesale

NOTICE DATE: February 24, 2011

NOTICE TYPE: M-A022411-01 INITIAL: Maintenance Outage – Retail/Wholesale