CRR; Extracts Retail; Extracts Wholesale; Operations; Outages Retail; Outages Wholesale

Wed, Feb 03, 2021 12:12 PM

M-B020421-01 Planned system maintenance with impacted services

NOTICE DATE: February 4, 2021

NOTICE TYPE: M-B020421-01 Outage - Retail/Wholesale

SHORT DESCRIPTION: Planned system maintenance with impacted services


DAYS AFFECTED: February 8, 2021 17:00 – 19:00, February 10, 2021 10:00 – 12:00

LONG DESCRIPTION: ERCOT will be performing planned system maintenance of several databases and applications on February 8 and February 10, 2021.

During the February 8, 2021 17:00 – 19:00 outage window, all services available through the Market Information System (MIS) will be unavailable, including the following:

  • Market submissions and requests via External Web Services (EWS), Market Manager and Outage Scheduler
  • Report publishing to the ERCOT MIS
  • Downloading of extracts and reports from the MIS and EWS
  • Net Dependable Capability and Reactive Capability (NDCRC)
  • Congestion Revenue Right (CRR) Market User Interface
  • The following ERCOT internet services:
  • Market Data Transparency (MDT) Web Services
  • Extract Subscriber
  • Find ESIID and Find Transaction

During this outage window, please use the following URLs to directly access the Market Manager, CRR Market User Interface, and Outage Scheduler: 

Note that the outage start times may be delayed depending on the current system conditions.

During the February 10, 2021 10:00 – 12:00 outage window, Market Participants may experience intermittent issues with the following services:

  • Find ESIID

ADDITIONAL INFORMATION: Reports will be rerun and reposted as applicable. The MIS Dashboards and price displays will not be populated with data during the February 8, 2021 17:00 – 19:00 timeframe.

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

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