NOTICE DATE: February 15, 2010 NOTICE TYPE: M-A021510-02 Outage SHORT DESCRIPTION: MOS Listener outage on February 14, 2010 INTENDED AUDIENCE: ERCOT Market Participants DAY AFFECTED: February 14, 2010, from 6:35 AM to 7:08 AM LONG DESCRIPTION: ERCOT failed to update a configuration file prior to starting the scheduled Maintenance Outage on Sunday morning, February 14, 2010. This resulted in an outage of the MOS Listener from 6:35 AM until 7:08 AM. As a mitigation plan, prior to future Maintenance Outages, a checklist will be performed in order to avoid a similar-type outage. 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]>. If you are receiving email from an ERCOT distribution list that you no longer wish to receive, please follow this link in order to unsubscribe from this list: http://lists.ercot.com<http://lists.ercot.com/>. dh