NOTICE DATE:  May 3, 2010

NOTICE TYPE:  W-A050310-01 Outage - Wholesale

SHORT DESCRIPTION:  Unscheduled outage of NMMS

INTENDED AUDIENCE:  TDSPs/TSPs

DAY AFFECTED:  May 3, 2010

LONG DESCRIPTION:  The Network Model Management System (NMMS) is currently experiencing an outage. NMMS, supporting the Single Entry Model, is currently inaccessible. ERCOT will communicate more information on this outage as it becomes available.

CONTACT:  If you have any questions, please forward them to [log in to unmask] or 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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