NOTICE DATE:  April 21, 2011

NOTICE TYPE:  M-A042111-01 INITIAL:  Maintenance Outage – Retail/Wholesale

SHORT DESCRIPTION:  Scheduled Maintenance Outage

INTENDED AUDIENCE:  All Market Participants

DAY AFFECTED:  Sunday, May 1, 2011 from 06:00 through 21:00

LONG DESCRIPTION:  ERCOT has scheduled a maintenance outage for Sunday, May 1, 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
• Current Day Reports without retry functionality may not be rerun for the missed postings during the outage time.
• MIS Secure area dashboards will be intermittently unavailable
• USA Functionalities
• Extract Subscriber
• Market Data Transparency

o    During this outage, please use the following URLs to directly access the Market Manager and Outage Scheduler: 

https://mis.ercot.com/mmsui/mmsui/displayTradesLanding.action

https://mis.ercot.com/osrui/osrui/Summary.action

• Components of the External Web Services (EWS) will intermittently 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.

JR/DP

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