NOTICE DATE: July 2, 2008

NOTICE TYPE: W-A042308-49 UPDATE Extracts - Wholesale

CLASSIFICATION: Public

SHORT DESCRIPTION: ERCOT has posted the extracts for April 21 through April 30, 2008.

INTENDED AUDIENCE: QSEs

DAY AFFECTED: April 21 through April 30, 2008

LONG DESCRIPTION: ERCOT conducted an emergency database failover on April 21, 2008 following a hardware failure. This database failover resulted in an out-of-synch data problem from April 21 through April 30. ERCOT developed a phased process to attempt to thoroughly recover the missing data. The missing data was recovered and the following extracts have been posted for the time period of 04/21/2008 00:00:00 – 04/30/2008 23:59:59 (one for each day).

Act_Res_Output

Ancillary_Services_Daily

Bids_and_Schedules_Daily

Forecast_Data_Daily

Market_Information_Daily

Sched_and_Actual_Load

Self_Sch_Energy_Services

ASDEPLOYMENTS

ADDITIONAL INFORMATION: ERCOT has filed with the Public Utility Commission of Texas (PUCT), NOTICE OF P.U.C. SUBSTANTIVE RULE AND PROTOCOL VIOLATION (Control number 27706, Item Number 118). The full PUCT filing is available from the PUCT website at the following web address:

http://interchange.puc.state.tx.us/WebApp/Interchange/application/dbapps/filings/pgSearch.asp

From this page, select “Filings Retrieval” from the column on the right side of the page then select Login. Enter the Control Number (27706) and select “Search Now”.

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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