NOTICE DATE: February 26, 2010

NOTICE TYPE: W-A022610-01 Outage

SHORT DESCRIPTION: Network Model Management System (NMMS) outage on February 26, 2010, has been resolved

INTENDED AUDIENCE: TDSPs / TSPs

DAY AFFECTED: February 26, 2010, 8:40 AM – 11:15 AM

LONG DESCRIPTION: NMMS experienced an outage of the production system from 8:40 AM until 11:15 AM February 26, 2010. Technical support has resolved the issue, and NMMS is back in service.

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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