NOTICE DATE:  March 14, 2012

NOTICE TYPE:  W-B031412-01 Extracts – Wholesale

SHORT DESCRIPTION:  Incorrect postings within the 48 Hour Ancillary Services Reports

INTENDED AUDIENCE:  ERCOT Market Participants

DAY AFFECTED:  Operating Day March 11, 2012

LONG DESCRIPTION:  There are five files contained in the 48 Hour Ancillary Services Report (NP3-911-ER) with the prefix “48h_Self_Arranged_AS_...” that were posted on March 13, 2012, with incorrect data for Operating Day March 11, 2012. The zip file containing these incorrect files has been removed from the Market Information System (MIS). 

Name of the removed zip file:

ext.00013057.0000000000000000.20120313.031442.48_Hour_AS_Disclosure

ERCOT removed the five incorrect files and posted a replacement zip file at 12:56 CDT on March 14, 2012. There are no changes to the remaining files that are contained in the posting.

Name of the replacement zip file:

ext.00013057.0000000000000000.20120314.125621.48_Hour_AS_Disclosure

Note that the following file is the regular daily posting for March 14, 2012; this file is correct:

ext.00013057.0000000000000000.20120314.030658.48_Hour_AS_Disclosure

ADDITIONAL INFORMATION:  ERCOT will repost an updated zip file containing the five corrected files (including the other remaining files) for Operating Day March 11, 2012, as soon as possible.

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].

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dh