NOTICE DATE: April 24, 2008

NOTICE TYPE: W-A042308-02 UPDATE Extracts

CLASSIFICATION: Public

SHORT DESCRIPTION: Market Information Extracts were impacted as a result of an ERCOT database failover. The impacted Extracts have been removed.

INTENDED AUDIENCE: QSEs

DAY AFFECTED: April 21, 2008 and April 23, 2008

LONG DESCRIPTION: Due to a database emergency failover on April 21, 2008 some Extracts were posted with missing data. ERCOT has removed these Extracts and will provide an update when the corrected Extracts are posted.

The following Extracts were impacted:

Forecast_Data_Daily

Market_Information_Daily

Ancillary_Services_Daily

Bids_and_Schedules_Daily

ASDEPLOYMENTS

Self_Sch_Energy_Services

Actual_Resource_Output

Dynamic_Load

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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