NOTICE DATE: December 11, 2019

NOTICE TYPE: M-A121119-01 Outage – Retail/Wholesale

SHORT DESCRIPTION: Planned system maintenance with impacted services

INTENDED AUDIENCE: All Market Participants

DAY AFFECTED: December 18, 2019 10:30 - 13:30, December 18, 2019 17:30 - 20:30

LONG DESCRIPTION: ERCOT will be performing planned system maintenance of several databases and applications on December 18, 2019.

During the December 18, 2019 10:30 – 13:30 outage window, Market Participants may experience intermittent issues with the following service:

• Find ESIID

During the December 18, 2019 17:30 – 20:30 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

Also unavailable during this maintenance window is the following service:

• ERCOT Interconnection Services (GINR) - https://sa.ercot.com/ginr/

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

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 December 18, 2019 17:30 – 20:30 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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