NOTICE DATE: September 2, 2011 NOTICE TYPE: W-A090211-01 Extracts - Wholesale SHORT DESCRIPTION: NP6-622-ER State Estimator Transformer Information Report contains multiple data records for the same piece of equipment for the same moment in time INTENDED AUDIENCE: ERCOT Market Participants DAY AFFECTED: September 2, 2011 LONG DESCRIPTION: The NP6-622-ER State Estimator (SE) Transformer Information Report contains multiple data records for the same piece of equipment for the same moment in time. This is a result of data processing behavior that ERCOT is experiencing between the EMS source system and replication for reporting. Currently, our replication process is committing records at a 1 second interval based on the snapshot data from the EMS source system. The EMS source system, however, has the capability of changing data element measurements at a sub-second interval. This creates the opportunity for the reporting system to have multiple data records for the same second for a given element. ERCOT development is currently working on a solution to be implemented Q4 2011 that will provide unique measurements for each piece of equipment for each SE execution. 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. ad ############################ To unsubscribe from the NOTICE_EXTRACTS_RETAIL list: write to: mailto:[log in to unmask] or click the following link: http://lists.ercot.com/SCRIPTS/WA-ERCOT.EXE?SUBED1=NOTICE_EXTRACTS_RETAIL&A=1