NOTICE DATE:  December 7, 2012

NOTICE TYPE:  M-A112812-03 UPDATE: Maintenance Outage – Retail/Wholesale

SHORT DESCRIPTION:  ERCOT will perform a maintenance outage from 12:00 to 21:00 on Sunday, December 9, 2012 instead of the originally scheduled retail release.

INTENDED AUDIENCE:  All Market Participants

DAYS AFFECTED: Sunday, December 9, 2012 from 12:00 to 21:00

LONG DESCRIPTION: ERCOT has cancelled the on-cycle retail release planned for 14:00 Saturday, December 8, 2012 through 00:00 Monday, December 10, 2012.

ERCOT will perform a maintenance outage from 12:00 to 21:00 on Sunday, December 9, 2012 instead.

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.
• Retail components of the MIS and the Retail API will not be available.
• MarkeTrak will be unavailable.
• eService application will be unavailable on the Market Information System (MIS).
• REC (Texas Renewables – www.texasrenewables.com) will be unavailable.
• ETOD will be unavailable.

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/DH

414909

From: ERCOT Client Services
Sent: Wednesday, November 28, 2012 1:14 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-A112812-02 REMINDER - Release – Retail - 14:00 Saturday, December 8, 2012 through 00:00 Monday, December 10, 2012

NOTICE DATE:  November 28, 2012

NOTICE TYPE:  M-A112812-02 REMINDER: Release – Retail

SHORT DESCRIPTION:  ERCOT has an on-cycle retail release planned for 14:00 Saturday, December 8, 2012 through 00:00 Monday, December 10, 2012.

INTENDED AUDIENCE:  All Market Participants

DAYS AFFECTED: 14:00 Saturday, December 8, 2012 through 00:00 Monday, December 10, 2012

LONG DESCRIPTION: ERCOT has an on-cycle retail release planned for 14:00 Saturday, December 8, 2012 through 00:00 Monday, December 10, 2012.

ERCOT will be implementing an upgrade to the database systems supporting EDI, EIF, and FTP.

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.
• Retail components of the MIS and the Retail API will not be available.
• MarkeTrak will be unavailable.
• eService application will be unavailable on the Market Information System (MIS).
• MPIM will be unavailable.

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/DH

414909

From: ERCOT Client Services
Sent: Wednesday, November 14, 2012 11:00 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-A111412-01 INITIAL - Release – Retail - 14:00 Saturday, December 8, 2012 through 00:00 Monday, December 10, 2012

NOTICE DATE:  November 14, 2012

NOTICE TYPE:  M-A111412-01 INITIAL: Release – Retail

SHORT DESCRIPTION:  ERCOT has an on-cycle retail release planned for 14:00 Saturday, December 8, 2012 through 00:00 Monday, December 10, 2012.

INTENDED AUDIENCE:  All Market Participants

DAYS AFFECTED: 14:00 Saturday, December 8, 2012 through 00:00 Monday, December 10, 2012

LONG DESCRIPTION: ERCOT has an on-cycle retail release planned for 14:00 Saturday, December 8, 2012 through 00:00 Monday, December 10, 2012.

ERCOT will be implementing an upgrade to the  database systems supporting EDI, EIF, and FTP.

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.
• Retail components of the MIS and the Retail API will not be available.
• MarkeTrak will be unavailable.
• eService application will be unavailable on the Market Information System (MIS).
• MPIM will be unavailable.

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/DH

414909