Good Evening, The ERCOT emergency maintenance outage completed at approximately 7:20 PM today, Monday, July 13, 2009. As always, connectivity issues such as NAESB or TML can be reported to the ERCOT Help Desk at 512-248-6800 or [log in to unmask]<mailto:[log in to unmask]> or tomorrow to your ERCOT Account Manager. JR Jim Rudd Retail Account Manager Retail Client Services ERCOT •512-248-6346 From: ERCOT Client Relations Sent: Monday, July 13, 2009 5:07 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-A071309-01 Emergency - Maintenance - Retail/Wholesale NOTICE DATE: July 13, 2009 NOTICE TYPE: M-A071309-01 Emergency - Maintenance – Retail/Wholesale SHORT DESCRIPTION: Emergency Maintenance INTENDED AUDIENCE: All Market Participants DAY AFFECTED: Monday, July 13, 2009 from 7:00 PM through 9:00 PM LONG DESCRIPTION: ERCOT has scheduled an emergency maintenance effort for Monday, July 13, 2009 from 7:00 PM through 9:00 PM. The effort is required to address a single point of failure issue and may result in an outage. ADDITIONAL INFORMATION: During the effort, the following functions may be affected: * Market Participants utilizing NAESB to send/receive transactions to/from ERCOT may NOT be able to send/receive transactions to/from ERCOT during the outage. This includes all retail transactions. * 867 transactions may NOT be forwarded during the outage. * 997 Functional Acknowledgements may NOT be sent during the outage. * Components of the TML and Commercial API may 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 may NOT be available, including but not limited to: * ERCOT.com – www.ercot.com<http://www.ercot.com> * MarkeTrak - https://marketrak.ercot.com:8443/tmtrack.dll? * TCR - https://tcr.ercot.com<https://tcr.ercot.com/> * Texas Renewables – www.texasrenewables.com<http://www.texasrenewables.com/> 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]<mailto:[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<http://lists.ercot.com/>. DP/JR/DH