***** EXTERNAL email. Please be cautious and evaluate before you click on links, open attachments, or provide credentials. ***** NOTICE DATE: March 19, 2018 NOTICE TYPE: M-A031918-01 Extracts SHORT DESCRIPTION: Supplemental IDR Interval Data Extract to be reposted INTENDED AUDIENCE: LSEs and TDSPs DAY AFFECTED: 3/19/2018 LONG DESCRIPTION: The Supplemental IDR Interval Data Extract (COMS-457, Report ID 1041) posted with incomplete data and has been removed from the Market Information System (MIS) Certified for 03/19/2018. The complete extracts have now been posted. Additional communications will be sent if other impacts are identified. 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 a public 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. mm