NOTICE DATE: September 27, 2019

NOTICE TYPE: M-B092719-01 Outage - Retail/Wholesale

SHORT DESCRIPTION: Planned system maintenance with impacted services

INTENDED AUDIENCE: ERCOT Market Participants

DAYS AFFECTED: October 2, 2019 09:30 – 12:00, October 2, 2019 16:30 – 19:30, October 3, 2019 10:00 – 12:00, October 3, 2019 16:30 – 18:30

LONG DESCRIPTION: ERCOT will be performing planned system maintenance of several databases and applications on October 2 – 3, 2019.

During the October 2, 2019 09:30 – 12:00 outage window, Market Participants may experience intermittent issues with the following services:

• Find ESIID

During the October 2, 2019 16:30 – 19:30 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
• Find ESIID and Find Transaction
• Market Participant Identity Manager (MPIM)
• Market Data Transparency (MDT) Web Services
• Extract Subscriber
• Service Requests

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

• https://mis.ercot.com/mmsui/mmsui/displayTradesLanding.action
• https://mis.ercot.com/mui-ercot-ihedge/
• https://mis.ercot.com/osrui/osrui/Summary.action

During the October 3, 2019 10:00 – 12:00 outage window, Market Participants may experience intermittent issues with the following services:

• ERCOT.com

During the October 3, 2019 16:30 – 18:30 outage window, Market Participants may experience intermittent issues with the following services:

• Market Participant Identity Manager (MPIM)
• The following ERCOT internet services:
  • Texas Renewables – www.texasrenewables.com
  • Retail Testing Website – etod.ercot.com
  • ERCOT Interconnection Services (GINR) – https://sa.ercot.com/ginr/
• Market Data Transparency (MDT) Web Services
• Extract Subscriber
• Net Dependable Capability and Reactive Capability (NDCRC)

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

ADDITIONAL INFORMATION: Reports will be rerun and reposted as applicable. The MIS Dashboards and ERCOT.com price displays will not be populated with data during the October 3 16:30 – 19:30 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 [log in to unmask].

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