NOTICE DATE: June 12, 2013 NOTICE TYPE: M-B061213-01 Settlements SHORT DESCRIPTION: ERCOT is investigating a defect in the Simultaneous Feasibility Test (SFT) that affected certain Congestion Revenue Rights (CRRs). INTENDED AUDIENCE: CRR Account Holder and Settlement Personnel DAY AFFECTED: February 14, 2013 through June 13, 2013 LONG DESCRIPTION: ERCOT recently discovered a defect in the SFT process. SFT provides ERCOT Settlements with the data necessary to perform CRR deration calculations as defined in Nodal Protocols Section 7.9.1, Day-Ahead CRR Payments and Charges. This defect was introduced into ERCOT systems with the implementation of Nodal Protocol Revision Request (NPRR) 322, Real-Time PTP Option Modeling, which was released into production on Operating Day February 14, 2013. The planned migration date for the defect resolution into ERCOT systems is June 13, 2013 and will be effective for the Day-Ahead Market (DAM) for Operating Day June 14, 2013. ERCOT is currently performing analysis to re-calculate the SFT data and associated settlement in order to determine if a DAM Resettlement is required for any of the impacted Operating Days. Per paragraph (2) of Nodal Protocols Section 9.2.5: "ERCOT shall issue a DAM Resettlement Statement for a given DAM due to error in data other than prices when the total of all errors in data other than prices results in an impact greater than 2% of the total payments due to ERCOT for the DAM, excluding bilateral transactions." Additional details will be provided to the market once ERCOT has completed its analysis. 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 email at [log in to unmask]<mailto:[log in to unmask]>. If you are receiving email 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. ka