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NOTICE DATE:  March 2, 2021

NOTICE TYPE:  M-A020121-04 Outage - Wholesale

SHORT DESCRIPTION:  Market Management and Outage Scheduler (MMS/OS) Systems/Applications Outage during MMS/OS Tech Refresh Project Production Cutover


DAY AFFECTED:  March 4, 2021, 15:25 – 17:00 CPT

LONG DESCRIPTION:  ERCOT will be performing a MMS/OS systems and database upgrade to newer hardware and software versions as part of the MMS/OS Tech Refresh Project production cutover between 15:25 and 17:00 CPT on Thursday, March 4, 2021.

During the production cutover period on March 4, 2021, Market Participants will experience an outage on the following services from 15:25 until 17:00:

Note that the start and completion times of this outage may be delayed depending on system conditions at that time. A Hotline call to Market Participants will be executed prior to the start and following the completion of the production cutover.

ACTION REQUIRED:  QSEs with Resources will need to follow Emergency Base Points during the outage. All QSEs need to be aware of the timeline changes in HRUC.

ADDITIONAL INFORMATION: Please review the ERCOT website for previous Market Notices related to this subject. 

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].

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