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Market Notice
February 27, 2019

REQUESTED ACTION

Information Only

CATEGORIES

Information Technology

Settlements

Western Energy Imbalance Market

OASIS Production Data Retrieval Issues

SUMMARY

The California ISO is addressing the Open-Access Same Time Information System (OASIS) production issue encountered through the application programming interfaces (API). Users can now retry accessing price data via the Groupzip files for trading days between Feb. 19, 2019 and Feb. 26, 2019 hour-ending (HE)9.


MESSAGE

OASIS contained a functional variance for Groupzip files starting Feb. 19, 2019 that resulted in market participants being unable to retrieve complete price information. The ISO backfilled day-ahead and real-time market price data Groupzip files for trading days between Feb. 19, 2019 and Feb. 26, 2019 HE9. Users should retry the API request for these trade dates.

 

An additional change has been implemented to queue historical requests behind real-time requests. If this message is returned: <m:ERR_DESC> GroupZip DownLoad is in Processing, Please Submit request after Sometime</m:ERR_DESC>”, the API file generation process has initiated, and the users must retry the request to retrieve the completely generated file at a later time.

 

Please join the Technical User Group call on Tuesday, March 5, 2019 from 10 a.m. to 11 a.m. (Pacific Time) for more details and the action the ISO is taking to resolve these issues going forward.


CONTACT INFORMATION

For any production issues encountered, please contact the ISO Service Desk at 1-888-889-0450 or your client representative.

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California Independent System Operator | P.O. Box 639014 | Folsom, CA 95630 | United States