NOTICE DATE:  October 22, 2010

NOTICE TYPE:  M-B101410-03 UPDATE: Release – Retail/Wholesale

SHORT DESCRIPTION:  ERCOT has an on-cycle release planned for 12:00 Saturday, October 23, 2010 through 00:00 Monday, October 25, 2010.

INTENDED AUDIENCE:  All Market Participants

DAY AFFECTED:  12:00 Saturday, October 23, 2010 through 00:00 Monday, October 25, 2010

LONG DESCRIPTION:  ERCOT has an on-cycle release planned for 12:00 Saturday, October 23, 2010 through 00:00 Monday, October 25, 2010.

Please note that this is a change from the maintenance outage originally scheduled for Sunday, October 24, 2010 from 08:00 through 20:00.

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 intermittently NOT be available including:
• Retail Applications
• Downloading of extracts and reports
• Components of the External Web Services (EWS) will intermittently NOT be available including:
• GetReport

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.

DP/DG

177107

From: ERCOT Client Relations
Sent: Tuesday, October 19, 2010 3:08 PM
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-B101410-02 UPDATE: Release - Retail/Wholesale - 12:00 Saturday, October 23, 2010 through 00:00 Monday, October 25, 2010

NOTICE DATE:  October 19, 2010

NOTICE TYPE:  M-B101410-02 UPDATE: Release – Retail/Wholesale

SHORT DESCRIPTION:  ERCOT has an on-cycle release planned for 12:00 Saturday, October 23, 2010 through 00:00 Monday, October 25, 2010.

INTENDED AUDIENCE:  All Market Participants

DAY AFFECTED:  12:00 Saturday, October 23, 2010 through 00:00 Monday, October 25, 2010

LONG DESCRIPTION:  ERCOT has an on-cycle release planned for 12:00 Saturday, October 23, 2010 through 00:00 Monday, October 25, 2010.

Please note that this is a change from the maintenance outage originally scheduled for Sunday, October 24, 2010 from 08:00 through 20:00.

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

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

177107

From: ERCOT Client Relations
Sent: Thursday, October 14, 2010 3:29 PM
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-B101410-01 INITIAL: Maintenance Outage – Retail/Wholesale - Sunday, October 24, 2010 from 08:00 through 20:00

NOTICE DATE:  October 14, 2010

NOTICE TYPE:  M-B101410-01 INITIAL: Maintenance Outage – Retail/Wholesale

SHORT DESCRIPTION:  Scheduled Maintenance Outage

INTENDED AUDIENCE:  All Market Participants

DAY AFFECTED:  Sunday, October 24, 2010 from 08:00 through 20:00

LONG DESCRIPTION:  ERCOT has scheduled a maintenance outage for Sunday, October 24, 2010 from 08:00 through 20:00.

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

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

177107