NOTICE DATE:  April 28, 2008          

NOTICE TYPE:  M-B042808-01 Release - Retail        

CLASSIFICATION:  Public

SHORT DESCRIPTION:  ERCOT has a scheduled Retail Release beginning 12:00
PM Saturday, June 14, 2008 through 12:00 AM Monday, June 16, 2008.

INTENDED AUDIENCE:  All Market Participants        

DAY AFFECTED:  12:00 PM Saturday, June 14, 2008 through 12:00 AM Monday,
June 16, 2008

LONG DESCRIPTION:  ERCOT has an on-cycle Retail release scheduled from
12:00 PM Saturday, June 14, 2008 through 12:00 AM Monday, June 16, 2008.
For reference, both Market Impact SIRs and Internal ERCOT SIRs with no
Market impact are included on the attached document.   

ACTION REQUIRED:  Market Participants who utilize MarkeTrak API will
need to update their .wsdl and .xsd files for use after this Retail
Release.  The updated versions are attached.     

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 
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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/> .

JA/TR