NOTICE DATE:  February 12, 2010

NOTICE TYPE:  W-A021210-01 Outage

SHORT DESCRIPTION:  Network Model Management System (NMMS) user access failure

INTENDED AUDIENCE:  TDSPs / TSPs

DAY AFFECTED:  February 12, 2010

LONG DESCRIPTION:  During overnight security testing, some users unexpectedly lost access to NMMS Friday morning February 12, 2010. The affected users were removed from the NMMS_IMM group by the Market Participant Identity Management (MPIM) tool. ERCOT has put the users back into the group, and the problem has been corrected.

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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dh