NOTICE DATE: December 8, 2012 NOTICE TYPE: R-A120812-01 Retail Processing SHORT DESCRIPTION: Due to a system issue, some retail transactions failed to process at ERCOT. INTENDED AUDIENCE: CRs and TDSPs DAY AFFECTED: Friday, December 7, 2012 at approximately 23:50 through Saturday, December 8, 2012 at approximately 09:15 LONG DESCRIPTION: During the time specified, ERCOT was unable to accept some North American Energy Standards Board (NAESB) transactions, because of an issue with a NAESB proxy server. The processing of files submitted through the impacted proxy server would have failed, while all other files submitted would have processed normally. ADDITIONAL INFORMATION: The proxy server issue was resolved and normal processing resumed. 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. JR 426672