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NOTICE DATE: December 13, 2010

NOTICE TYPE: R-A121110-03 UPDATE: Outage - Update to notices R-A121110 and R-A121310 – Retail Transaction Processing Outage

INTENDED AUDIENCE: LSEs and TDSPs

SHORT DESCRIPTION: ERCOT experienced a retail transaction processing outage from 09:25 to 21:24 on Saturday, December 11, 2010.

ERCOT had a second outbound NAESB outage from 21:41 on Saturday, December 11, 2010 through 09:58 Sunday, December 12, 2011.

DAY AFFECTED: December 11, 2010 from 09:25 to 21:24 and 21:41 Saturday, December 11 to 09:58 Sunday, December 12, 2010.

LONG DESCRIPTION: ERCOT experienced a retail transaction processing outage from 09:25 to 21:24 on Saturday, December 11, 2010 and from 21:41 Saturday, December 11, 2010 through 9:58 Sunday, December 12, 2010.

The first outage impacted all retail transaction applications, including the Customer Registration Database, Enterprise Application Integration database, Electronic Data Interchange database, and NAESB.

Market Participants did receive NAESB error messages, and when ERCOT’s NAESB came back up, transactions that had been queued at Market Participants side did flow into ERCOT.

The second outage impacted outbound NAESB only, the backlog of transactions from the first outage were processing at ERCOT, and were sent outbound Sunday, December 12, 2010, starting at 9:58.

At this time, ERCOT is processing all retail transactions.

ADDITIONAL INFORMATION: Transaction protocol timings were not impacted as the outages occurred during non-business hours.

The root cause was a hardware failure on Saturday at 09:25. Separately, ERCOT experienced an application failure for NAESB outbound on Saturday 21:41.

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.

JR/DP

195004

From: ERCOT Client Services
Sent: Saturday, December 11, 2010 11:12 PM
To: HelpDesk; [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-A121110-02 UPDATE: Outage - Enterprise Application Integration Database - December 11, 2010 from 09:25 to 21:24

NOTICE DATE: December 11, 2010

NOTICE TYPE: R-A121110-02 UPDATE: Outage - Enterprise Application Integration Database

INTENDED AUDIENCE: LSEs and TDSPs

SHORT DESCRIPTION: ERCOT’s Enterprise Application Integration (EAI) Database experienced an outage from 09:25 to 21:24 on Saturday, December 11, 2010.

DAY AFFECTED: December 11, 2010 from 09:25 to 21:24

LONG DESCRIPTION: ERCOT’s Enterprise Application Integration (EAI) Database experienced an outage from 09:25 to 21:24 on Saturday, December 11, 2010.

At this time, ERCOT is processing all retail transactions.

ERCOT will provide additional information regarding this outage on Monday, December 13, 2010.

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.

From: HelpDesk
Sent: Saturday, December 11, 2010 8:15 PM
To: [log in to unmask]; ERCOT Client Relations; [log in to unmask]
Cc: [log in to unmask]; [log in to unmask]; [log in to unmask]; 1 ERCOT Client Service Reps
Subject: R-A121101-01 UPDATE: Outage - Enterprise Application Integration Database

Subject: R-A121101-01 UPDATE: Outage - Enterprise Application Integration Database

NOTICE DATE: December 11, 2010

NOTICE TYPE: R-A121110-01 UPDATE: Outage - Enterprise Application Integration Database

INTENDED AUDIENCE: LSEs and TDSPs

SHORT DESCRIPTION: ERCOT is currently experiencing an outage of Enterprise Application Integration (EAI) Database

DAY AFFECTED: 12/11/10 09:25 to Current

LONG DESCRIPTION: ERCOT is currently experiencing an outage of Enterprise Application Integration (EAI) Database. At this time, ERCOT is not processing anyretail transactions.

ERCOT is working on resolving this issue and will provide additional information as it becomes 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.

From: NOTICE RELEASE RETAIL [[log in to unmask]] On Behalf Of ERCOT Help Desk [[log in to unmask]]
Sent: Saturday, December 11, 2010 10:39 AM
To: [log in to unmask]
Subject: INITIAL NOTICE - System Outage - Enterprise Application Integration (EAI)

NOTICE DATE: 12/11/10 10:39:02

NOTICE TYPE: Initial Enterprise Application Integration (EAI) Notice

INTENDED AUDIENCE: LSEs and TDSPs

DAY AFFECTED: 12/11/10 09:25:57

DESCRIPTION: ERCOT is currently experiencing an outage of Enterprise Application Integration (EAI)

ERCOT is working on resolving this issue and will provide additional information as it becomes 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.