NOTICE DATE:  March 21, 2008          

NOTICE TYPE:  M-B032108-01 Outage - Retail/Wholesale        

CLASSIFICATION:  Public

SHORT DESCRIPTION:  ERCOT has scheduled an unplanned outage for
Saturday, March 22, 2008.        

INTENDED AUDIENCE:  All Market Participants        

DAY AFFECTED:  Saturday, March 22, 2008 from 8:00 AM to 8:00 PM        

LONG DESCRIPTION:  ERCOT has scheduled an unplanned outage for Saturday,
March 22, 2008 from 8:00 AM to 8:00 PM.

The reprocessing efforts resulting from the March 12, 2008 retail
transaction processing outage (referenced in Market notice M-A031208)
will be delayed as a result of this outage.

Due to the volume of files needing to be reprocessed and recent
production issues there is the possibility of duplicate outbound
transactions.  

ERCOT Retail Account Manager's will provide all affected Market
Participant's with a list of duplicates after 3:00 PM on Monday, March
24, 2008.

ADDITIONAL INFORMATION:  During the outage the following functions will
be affected: 

*	Market Participants utilizing NAESB to send/receive transactions
to/from ERCOT will NOT be able to send/receive transactions to/from
ERCOT during the outage.  This includes all retail transactions. 
*	867 Transactions will NOT be forwarded during the outage. 
*	997 functional acknowledgements will NOT be sent during the
outage. 
*	Components of the TML and commercial API will NOT be available
including: 

	*	Find ESI ID 
	*	Find Transaction 
	*	Submit Transactions 
	*	USA Functionalities 
	*	Report Explorer, including 

		*	Reports 
		*	Extracts 
		*	Invoices 
		*	Settlement Statements 

	*	Extract Scheduler 
	*	Web Services Data Requests  

*	ERCOT internet services will NOT be available, including but not
limited to: 

	*	ERCOT.com - www.ercot.com <http://www.ercot.com/>  
	*	MarkeTrak -
https://marketrak.ercot.com:8443/tmtrack.dll? 
	*	TCR - https://tcr.ercot.com <https://tcr.ercot.com/>  
	*	Texas Renewables - www.texasrenewables.com
<http://www.texasrenewables.com/>  

MOS, Scheduling API, MOSTML, MOSPUBLIC, and Outage Scheduler will not be
affected as there will be a DNS failover from Taylor to Austin.

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 <http://lists.ercot.com/> .

TR/DG