NOTICE DATE: April 3, 2026

NOTICE TYPE: M-C040326-01 Operations

SHORT DESCRIPTION: Impacts to SCED due to Market database connectivity issues

INTENDED AUDIENCE: All Market Participants

DAYS AFFECTED: March 5, 2026

LONG DESCRIPTION: On Operating Day (OD) March 5, 2026, Market database connectivity issues resulted in stale shift factor data being used in the 23:20 Security Constrained Economic Dispatch (SCED) run and the 23:30 and 23:35 SCED runs not executing. ERCOT cannot determine correct prices for SCED interval 23:20, because the correct shift factor data needed to recalculate affected SCED results cannot be accurately recreated. Impact analysis for SCED intervals 23:30 and 23:35 showed that we did not meet criteria for price correction.

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 ClientServices@ercot.com.

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.

dg