NOTICE DATE: March 19, 2008

NOTICE TYPE: R-A031908-02 UPDATE: Outage - Retail

CLASSIFICATION: Public

SHORT DESCRIPTION: The outage of ERCOT’s Electronic Data Interchange (EDI) application has ended.

INTENDED AUDIENCE: CRs and TDSPs

DAY AFFECTED: Wednesday, March 19, 2008 from 9:35 AM to 12:02 PM

LONG DESCRIPTION: ERCOT experienced an unplanned outage of the Electronic Data Interchange (EDI) application today, Wednesday, March 19, 2008, from 9:35 AM to 12:02 PM.

ERCOT has determined that this was the result of SAN hardware failure. Additional information will be provided in the ERCOT IT Incident Market Notice Summary.

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].

If you are receiving e-mail from an ERCOT distribution list that you no longer wish to receive, please follow this link in order to unsubscribe from this list: http://lists.ercot.com.

TR/JA

From: ERCOT Client Relations
Sent: Wednesday, March 19, 2008 10:33 AM
To: [log in to unmask]; [log in to unmask]
Cc: [log in to unmask]; [log in to unmask]; [log in to unmask]; 1 ERCOT Client Service Reps
Subject: R-A031908-01 Outage - Retail: Electronic Data Interchange (EDI) application

NOTICE DATE: March 19, 2008

NOTICE TYPE: R-A031908-01 Outage - Retail

CLASSIFICATION: Public

SHORT DESCRIPTION: ERCOT is currently experiencing an outage of the Electronic Data Interchange (EDI) application.

INTENDED AUDIENCE: CRs and TDSPs

DAY AFFECTED: Wednesday, March 19, 2008 from 9:35 AM to present

LONG DESCRIPTION: ERCOT is currently experiencing an outage of the Electronic Data Interchange (EDI) application. ERCOT is receiving inbound transactions however they are being held and not processed at this time. ERCOT outbound processing is limited to 997 response transactions only.

Additional information will be provided when available.

If you are receiving e-mail from an ERCOT distribution list that you no longer wish to receive, please follow this link in order to unsubscribe from this list: http://lists.ercot.com.

TR/JA