NOTICE DATE:  March 21, 2013

NOTICE TYPE:  M-C032113-01 Release - Retail/Wholesale

SHORT DESCRIPTION:  Implementation of market-facing changes for April 2013

INTENDED AUDIENCE:  ERCOT Market Participants

DAYS AFFECTED:  April 22-25, 2013

LONG DESCRIPTION:  ERCOT will be implementing a number of market-facing changes in the production environment on April 22-25, 2013. Please see the attached spreadsheet for the description and estimate of the release date for each change.

ADDITIONAL INFORMATION:  ERCOT may experience intermittent service interruptions during the implementation period. The systems include, but are not limited to:

*         Market Participant notifications

*         Outage Scheduler User Interface

*         Market Management System User Interface

*         Market Participant Identity Management (MPIM)

*         Components of the ERCOT Market Information System (MIS) may be intermittently unavailable including:

*         Report publishing to the MIS

*         Current Day Reports (CDRs) without retry functionality may not be rerun for the missed postings during the outage time

*         MIS and ERCOT.com dashboards

*         During this outage, please use the following URLs to directly access the Market Manager and Outage Scheduler:

*         https://mis.ercot.com/mmsui/mmsui/displayTradesLanding.action

*         https://mis.ercot.com/osrui/osrui/Summary.action

*         Components of the External Web Services (EWS) may be intermittently unavailable

*         Net Dependable Capability and Reactive Capability Systems (NDCRC)

Information on upcoming releases can be found on the ERCOT Multi Year Project Priority List (PPL) at http://www.ercot.com/services/projects/.

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]<mailto:[log in to unmask]>.

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