NOTICE DATE:  December 2, 2010

NOTICE TYPE:  M-A120210-01 General

SHORT DESCRIPTION:  Recommendations for opening compressed (.zip) reports on MIS


DAY AFFECTED:  December 2, 2010

LONG DESCRIPTION:  Some Market Participants (MPs) have had difficulty opening compressed reports in a .zip format, such as LMPs by Electrical Bus, on the Market Information System (MIS). The issue is caused by attempting to open the reports from web browsers using only the built-in zip utility that comes with some Windows installs. ERCOT’s recommendation is to use the zip utility from WinZip instead of using the built-in Windows utility that may not be able to open these files due to character limitations.

ADDITIONAL INFORMATION:  To clarify, this is not an issue with MIS or the reports. This issue is related to the utility being used to open zip files.

As a temporary work-around, instead of opening the zip file, MPs can download the zipped file to their systems and extract the file it contains before attempting to open it. Detailed instructions for doing this can be found at

As a result of these issues, ERCOT is currently only supporting WinZip and 7-Zip.

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].

For questions or clarifications related to technical issues, please contact the ERCOT Help Desk at (512) 248-3900 or via email at [log in to unmask].

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