The ERCOT planned maintenance outage completed at approximately 20:20 this evening, Sunday, October 07, 2012.  All systems and transaction processing were reinstated at that time.

As always, connectivity issues such as NAESB or MIS can be reported to the ERCOT Help Desk at 512-248-6800 or [log in to unmask] or tomorrow to your ERCOT Account Manager.

DH

From: ERCOT Client Services
Sent: Friday, October 05, 2012 10:08 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-A092712-02 REMINDER - Maintenance Outage – Retail/Wholesale - Sunday, October 7, 2012 from 06:00 through 21:00

NOTICE DATE:  October 5, 2012

NOTICE TYPE:  M-A092712-02 REMINDER:  Maintenance Outage – Retail/Wholesale

SHORT DESCRIPTION:  Scheduled Maintenance Outage

INTENDED AUDIENCE:  All Market Participants

DAY AFFECTED:  Sunday, October 7, 2012 from 06:00 through 21:00

LONG DESCRIPTION:  ERCOT has scheduled a maintenance outage for Sunday, October 7, 2012 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.
• MarkeTrak will be unavailable for the duration of the outage.

• ERCOT Internet Services may be intermittently unavailable, including but not limited to:
  • Texas Renewables – www.texasrenewables.com
• Retail Application components of the MIS and the Retail API will NOT be available.

• Retail Reports and Extracts may be impacted during the outage timeframe.
• eService application will be unavailable on the Market Information System (MIS).

• MPIM and NDCRC will be unavailable for the duration of the outage.
• Components of the MIS will intermittently NOT be available including:

Access to Dashboards

· Components on ERCOT.com will intermittently NOT be available including:

• Access to Dashboards
• Access to Public Notices

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/JR

396675

From: ERCOT Client Services
Sent: Thursday, September 27, 2012 4:57 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-A092712-01 INITIAL - Maintenance Outage – Retail/Wholesale - Sunday, October 7, 2012 from 06:00 through 21:00

NOTICE DATE:  September 27, 2012

NOTICE TYPE:  M-A092712-01 INITIAL:  Maintenance Outage – Retail/Wholesale

SHORT DESCRIPTION:  Scheduled Maintenance Outage

INTENDED AUDIENCE:  All Market Participants

DAY AFFECTED:  Sunday, October 7, 2012 from 06:00 through 21:00

LONG DESCRIPTION:  ERCOT has scheduled a maintenance outage for Sunday, October 7, 2012 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
• MarkeTrak will be unavailable for the duration of the outage

• ERCOT Internet Services may be intermittently unavailable, including but not limited to:
  • Texas Renewables – www.texasrenewables.com
• Retail Application components of the MIS and the Retail API will NOT be available

• Retail Reports and Extracts may be impacted during the outage timeframe
• eService application will be unavailable on the Market Information System (MIS)

• MPIM and NDCRC will be unavailable for the duration of the outage
• Components of the MIS will intermittently NOT be available including:

Access to Dashboards

· Components on ERCOT.com will intermittently NOT be available including:

• Access to Dashboards
• Access to Public Notices

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

396675