NOTICE DATE: March 20, 2008

NOTICE TYPE: M-A031708-05 UPDATE Extracts – Wholesale/Retail

CLASSIFICATION: Public

SHORT DESCRIPTION: Invoices have been posted

INTENDED AUDIENCE: All Market Participants

DAY AFFECTED: March 20, 2008

LONG DESCRIPTION: The invoices for March 20, 2008 have been posted. The Statements expected to post today will be delayed. The Settlement Calendar has been updated to reflect the change. The delay occurred due to the unplanned outage that occurred on March 20, 2008.

ERCOT is continuing to experience delays with the following reports. An update will be provided as information becomes available.

Settlement Input Data (SID)

Market Shadow Prices (SHP)

867_03 Activity Report

Forecasted Transmission Loss Factor

Actual Transmission Loss Factor

TDSP Distribution Loss Factors – Forecasted

TDSP Distribution Loss Factors – Actual

Unaccounted For Energy

Load Estimation Counts

Load Estimation Volume

ESI ID Consumption Data Loading – IDR Protocol Compliance – Daily

ADDITIONAL INFORMATION: All extracts/reports listed above have been posted for March 15-18, 2008.

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 e-mail at [log in to unmask].

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