NOTICE DATE: August 16, 2009 NOTICE TYPE: R-A081609-01 Outage - Retail Processing SHORT DESCRIPTION: NAESB became unresponsive at approximately 4:25 AM on Sunday, August 16, 2009. ERCOT was unable to receive or send transactions from approximately 4:25 AM until 7:58 AM on Sunday, August 16, 2009. INTENDED AUDIENCE: CRs and TDSPs DAY AFFECTED: Sunday, August 16 4:25 AM to 7:58 AM LONG DESCRIPTION: NAESB became unresponsive at approximately 4:25 AM on Sunday, August 16, 2009. ERCOT was unable to receive or send transactions from approximately 4:25 AM until 7:58 AM on Sunday, August 16, 2009. The NAESB, EDI, EAI, Customer Registration, and MarkeTrak databases had to be stopped to do a restart. Root cause will continue to be investigated on Monday, August 17, 2009. 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/>. JR