NOTICE DATE:  September 14, 2012

NOTICE TYPE:  M-A090612-02 REMINDER:  Maintenance Outage – Retail

SHORT DESCRIPTION:  Scheduled Maintenance Outage

INTENDED AUDIENCE:  All Market Participants

DAY AFFECTED:  Sunday, September 16, 2012 from 06:00 through 21:00

LONG DESCRIPTION:  ERCOT has scheduled a maintenance outage for Sunday, September 16, 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.

• ERCOT Internet Services may be intermittently unavailable, including but not limited to:
  • MarkeTrak - https://marketrak.ercot.com:8443/tmtrack.dll
  • Texas Renewables – www.texasrenewables.com
• Retail Application components of the MIS will NOT be available.

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/CD

378378

From: ERCOT Client Services
Sent: Thursday, September 06, 2012 1:31 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-A090612-01 INITIAL: Maintenance Outage – Retail - Sunday, September 16, 2012 from 06:00 through 21:00

NOTICE DATE:  September 6, 2012

NOTICE TYPE:  M-A090612-01 INITIAL:  Maintenance Outage – Retail

SHORT DESCRIPTION:  Scheduled Maintenance Outage

INTENDED AUDIENCE:  All Market Participants

DAY AFFECTED:  Sunday, September 16, 2012 from 06:00 through 21:00

LONG DESCRIPTION:  ERCOT has scheduled a maintenance outage for Sunday, September 16, 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.

• ERCOT Internet Services may be intermittently unavailable, including but not limited to:
  • MarkeTrak - https://marketrak.ercot.com:8443/tmtrack.dll
  • Texas Renewables – www.texasrenewables.com
• Retail Application components of the MIS will NOT be available.

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

378378