NOTICE DATE:  April 18, 2008

NOTICE TYPE:  M-A041808-01 Outage - Retail/Wholesale  

CLASSIFICATION:  Public

SHORT DESCRIPTION:  The Schedule \ Unschedule an Extract function of the
Texas Market Link (TML) experienced an outage from Sunday, March 30,
2008 at approximately 6:00 PM through Thursday, April 17, 2008 at
approximately 3:00 PM.   

INTENDED AUDIENCE:  All Market Participants

DAY AFFECTED:   Sunday, March 30, 2008 at approximately 6:00 PM through
Thursday, April 17, 2008 at approximately 3:00 PM.   

LONG DESCRIPTION:  ERCOT experienced an outage of the Schedule \
Unschedule an Extract function of the Texas Market Link (TML) as a
result of the implementation of Market Participant Identification
Management (MPIM).   The issues began Sunday, March 30, 2008 at
approximately 6:00 PM and continued through Thursday, April 17, 2008 at
approximately 3:00 PM.  

The issue was identified by a Market Participant on 4/14/2008.
Troubleshooting analysis took place and was believed to be isolated to
the Market Participant user.  ERCOT received additional helpdesk
tickets, which furthered the troubleshooting analysis. Root cause was
determined to be related to the code changes required for MPIM.  An
emergency change was implemented on 4/17/2008 to resolve the issue.

Market Participants who did not try to access the Schedule \ Unschedule
an Extract function of the Texas Market Link (TML) during this period
were not affected by this outage.

Users accessing the site received the following error: 

"The company name was not found".

The Schedule \ Unschedule an Extract function of the Texas Market Link
(TML) is now functioning normally.

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] <BLOCKED::mailto:[log in to unmask]> .

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DP/JA