June 12, 2026
Dispatch scheduling error and adjustments made for June 16 to June 25, 2025
Based on a review of real-time market results, for select intervals of trade dates from June 16, 2025 through June 25, 2025, a dispatch scheduling error (DSE) has been declared due to an incorrect demand calculation in the Dispatch Scheduling and Optimization (DSO) resulting in incorrect locational marginal prices in real-time. Settlement statements for affected market participants determined to be impacted by the DSE will include corrective amendments in accordance with the Market Rules Ch. 7 Section 7.6.
The DSE during this period has resulted in settlement adjustment for the following charges:
- June 16, 2025:
- CT1101 (Real-Time Energy Settlement Amount for Generators)
- CT1103 (Real-Time Market Energy Settlement Amount for Dispatchable Loads)
- CT1107 (Real-Time Energy Settlement Amount for Virtual Transactions to Sell)
- CT1109 (Real-Time Energy Settlement Amount for Virtual Transactions to Buy)
- CT1113 (Real-Time Energy Settlement Amount for Exports)
- CT1115 (Non-Dispatchable Load Energy Settlement Amount)
- CT213 (Real-Time 10-Minute Spinning Reserve Settlement Credit)
- CT215 (Real-Time Market 10-Minute Non-Spinning 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)
- June 18, 2025:
- CT1101 (Real-Time Energy Settlement Amount for Generators)
- CT1103 (Real-Time Market Energy Settlement Amount for Dispatchable Loads)
- CT1113 (Real-Time Energy Settlement Amount for Exports)
- CT1115 (Non-Dispatchable Load Energy Settlement Amount)
- CT213 (Real-Time 10-Minute Spinning Reserve Settlement Credit)
- CT215 (Real-Time Market 10-Minute Non-Spinning 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)
- June 23, 2025:
- CT1101 (Real-Time Energy Settlement Amount for Generators)
- CT1103 (Real-Time Market Energy Settlement Amount for Dispatchable Loads)
- CT1107 (Real-Time Energy Settlement Amount for Virtual Transactions to Sell)
- CT1113 (Real-Time Energy Settlement Amount for Exports)
- CT1115 (Non-Dispatchable Load Energy Settlement Amount)
- CT213 (Real-Time 10-Minute Spinning Reserve Settlement Credit)
- CT215 (Real-Time Market 10-Minute Non-Spinning Reserve Settlement Credit)
- CT250 (10-Minute Spinning Reserve Hourly Uplift), CT252 (10-Minute Non-Spinning Reserve Hourly Uplift)
- 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)
- June 25, 2025:
- CT1101 (Real-Time Energy Settlement Amount for Generators)
- CT1103 (Real-Time Market Energy Settlement Amount for Dispatchable Loads)
- CT1113 (Real-Time Energy Settlement Amount for Exports)
- CT1115 (Non-Dispatchable Load Energy Settlement Amount)
- CT213 (Real-Time 10-Minute Spinning Reserve Settlement Credit)
- CT215 (Real-Time Market 10-Minute Non-Spinning 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)
- June 30, 2025:
- CT 1116 (Internal Congestion and Loss Residual)
These amendments will appear on market participants’ recalculated settlement statement (RCSS-5) for June trade dates on June 12, 2026.
For more information, please contact IESOCustomerRelations@ieso.ca.