NOTICE DATE: December 1, 2022

NOTICE TYPE: W-A111822-02 Operations

SHORT DESCRIPTION: Network Model Management System (NMMS) Downtime for System Upgrade

INTENDED AUDIENCE: Transmission Service Providers

DAYS AFFECTED: December 2, 2022, 18:00 - December 5, 2022, 08:00

LONG DESCRIPTION: To accommodate a system upgrade, the Network Model Management System (NMMS) will be unavailable starting on Friday, December 2 at 18:00 through Monday, December 5 at 08:00.  When prompted, users must choose to install the latest available version of the model editor software.  Existing digital certificates can continue to be used without modification.

The upgrade focuses largely on backend systems and has minimal impact to the frontend application.  No changes have been made to grid modeling data or the associated database schemas.

ACTION REQUIRED: Users must choose to install the latest available version of MAGE when first launching the application post upgrade.  For assistance with the upgrade install, TSPs should email [log in to unmask]

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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