NOTICE DATE: November 29, 2012

NOTICE TYPE: W-A112912-01 Extracts – Wholesale

SHORT DESCRIPTION: CDR filename change

INTENDED AUDIENCE: ERCOT Market Participants

DAY AFFECTED: December 6, 2012

LONG DESCRIPTION: On December 6, 2012, ERCOT will implement the following Current Day Report (CDR) filename change for NP5-753-CD, Weekly RUC Active and Binding Transmission Constraints (Report ID 12337). The need for a filename change was discovered during the Fall 2012 Daylight Saving Time (DST) testing. Although not a DST issue, it was fixed as part of the planned production migration date of December 6, 2012. The link name is not changing in the Market Information System (MIS) or on ERCOT.com; it will remain Weekly RUC Active and Binding Transmission Constraints.

Current filename:

· cdr.00012337.0000000000000000.YYYYMMDD.HHMMSS.DAMAPROVABINDTRANSWrucNP5753.csv

· cdr.00012337.0000000000000000.YYYYMMDD.HHMMSS.DAMAPROVABINDTRANSWrucNP5753.xml

Filename after December 6 implementation:

· cdr.00012337.0000000000000000.YYYYMMDD.HHMMSS.WRUCAPROVABINDTRANSWrucNP5753.csv

· cdr.00012337.0000000000000000.YYYYMMDD.HHMMSS.WRUCAPROVABINDTRANSWrucNP5753.xml

This filename change does not impact the posted Current Day Reports XSD v6.4 document available on the ERCOT website, under Services, at http://www.ercot.com/services/mdt/xsds/.

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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