NOTICE DATE: July 18, 2019

NOTICE TYPE: M-B071819-01 Outage - Retail/Wholesale

SHORT DESCRIPTION: Planned system maintenance with impacted services

INTENDED AUDIENCE: July 24, 2019 09:30 – 12:00, July 24, 2019 16:30 – 20:00, July 25, 2019 10:00 – 12:00, July 25, 2019 16:30 – 18:30

DAYS AFFECTED: ERCOT Market Participants

LONG DESCRIPTION: ERCOT will be performing planned system maintenance of several databases and applications on July 24 – 25, 2019.

During the July 24, 2019 09:30 – 12:00 outage window, Market Participants may experience intermittent issues with the following services:

* Find ESIID

During the July 24, 2019 16:30 – 20:00 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
• 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 July 25, 2019 10:00 – 12:00 outage window, Market Participants may experience intermittent issues with the following services:

• ERCOT.com

During  the July 25, 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 July 25 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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