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NOTICE DATE:  September 15, 2017

NOTICE TYPE:  R-A081617-03 Release-Retail

SHORT DESCRIPTION:  Reminder - Retail Release September 2017

INTENDED AUDIENCE:  ERCOT Market Participants

DAY AFFECTED:  September 17, 2017 6:00 AM to September 18, 2017 12:00 AM

LONG DESCRIPTION:  ERCOT will be performing system maintenance in the production environment on September 17, 2017 06:00 AM to September 18, 2017 12:00 AM.

Please note that the maintenance window has been reduced from the time frame that was communicated in earlier Market Notices.

ADDITIONAL INFORMATION:  ERCOT systems may experience intermittent service interruptions during the implementation period. Areas impacted during the maintenance window include, but are not limited to:

*       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.
*       MarkeTrak will be unavailable for the duration of the outage.

*       Retail Application components of the Market Information System (MIS) and the Retail API will be unavailable

*       Retail Reports and Extracts may be impacted during the outage timeframe
*       eService application will be unavailable on the MIS

*       Find ESIID and Find Transaction will be unavailable



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 email at [log in to unmask]<mailto:[log in to unmask]>.

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