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Dispatch Scheduling Error Notifications

June 12, 2026

Dispatch scheduling error and adjustments made for June 24, 2025

Based on a review of day-ahead market (DAM) results, for all hours of trade date June 24, 2025, a dispatch scheduling error (DSE) has been declared due to a resource outage inadvertently omitted from the DAM due to a process failure. Settlement statements for affected market participants determined to be impacted by the DSE will include corrective amendments in accordance with the market rules.

The DSE during this period has resulted in settlement adjustment for the following charges:

  • June 24, 2025:
    • CT1100 (Day-Ahead Energy Settlement Amount for Generators)
    • CT1101 (Real-Time Energy Settlement Amount for Generators)
    • CT1102 (Day-Ahead Market Energy Settlement Amount for Dispatchable Loads)
    • CT1103 (Real-Time Market Energy Settlement Amount for Dispatchable Loads)
    • CT1106 (Day-Ahead Energy Settlement Amount for Virtual Transactions to Sell)
    • CT1107 (Real-Time Energy Settlement Amount for Virtual Transactions to Sell)
    • CT1108 (Day-Ahead Energy Settlement Amount for Virtual Transactions to Buy)
    • CT1109 (Real-Time Energy Settlement Amount for Virtual Transactions to Buy)
    • CT1110 (Day-Ahead Market Energy Settlement Amount for Imports)
    • CT1111 (Real-Time Market Energy Settlement Amount for Imports)
    • CT1112 (Day-Ahead Energy Settlement Amount for Exports)
    • CT1113 (Real-Time Energy Settlement Amount for Exports)
    • CT1115 (Non-Dispatchable Load Energy Settlement Amount)
    • CT1117 (Day-Ahead Market Net External Congestion Residual)
    • CT1119 (Day-Ahead Market Net Interchange Scheduling Limit Residual Uplift)
    • CT1120 (Real-Time Net Interchange Scheduling Limit Residual Uplift)
    • CT212 (Day-Ahead 10-Minute Spinning Reserve Settlement Credit)
    • CT213 (Real-Time 10-Minute Spinning Reserve Settlement Credit)
    • CT214 (Day-Ahead Market 10-Minute Non-Spinning Reserve Settlement Credit)
    • CT215 (Real-Time Market 10-Minute Non-Spinning Reserve Settlement Credit)
    • CT216 (Day-Ahead Market 30-Minute Operating Reserve Settlement Credit)
    • CT217 (Real-Time Market 30-Minute Operating Reserve Settlement Credit)
    • CT250 (10-Minute Spinning Reserve Hourly Uplift)
    • CT252 (10-Minute Non-Spinning Reserve Hourly Uplift)
    • CT254 (30-Minute Operating Reserve Hourly Uplift)

These settlement adjustments will appear on market participants’ recalculated settlement statement (RCSS-5) on June 12, 2026.

For more information, please contact IESOCustomerRelations@ieso.ca.