NOTICE DATE: September 1, 2021

NOTICE TYPE: R-A072121-02 Testing Reminder

SHORT DESCRIPTION: Reminder - Retail Market Qualification Testing (Flight 1021) begins September 14, 2021, registration deadline of September 8, 2021.

INTENDED AUDIENCE: Existing and potential new Competitive Retailers (CRs) and Transmission Distribution Service Providers (TDSPs)

DAYS AFFECTED: September 1, 2021 - October 29, 2021

LONG DESCRIPTION: ERCOT and the Texas Standard Electronic Transaction (TX SET) Working Group announce preparations are underway for the next round of Retail Market Qualification Testing, Flight 1021. Flight 1021 tests for TX SET Version 4.0A and is scheduled to begin September 14, 2021.

Registration for this Flight will be completed in the FlighTrak system.

Testing is required for:

Only TLS 1.2 will be used for NAESB transactions in Flight 1021

Participation in Out of Flight Testing is limited to existing Market Participants (CRs and TDSPs) that did not make the deadline for the actual Flight Test and is subject to Flight Administrator and TDSP approval. Out of Flight testing includes testing for changing service providers to an existing service provider and changing banking information.

ACTION REQUIRED: Please see the "Approved 2021 Test Flight Schedule" on Texas Retail Market Testing page and the Retail Market Test Flight Information page of for all registration and deadline information for Flight 0621.

Deadlines are:

New CRs participating in Flight 1021 are requested to have their banking information established prior to the Flight deadline, September 8, 2021 at 17:00 CPT.

ADDITIONAL INFORMATION: Available documents for Texas SET Version 4.0A are on

"Retail Market Testing Orientation information" is found on the Texas Retail Market Testing page of

The Flight Testing information is found in the "Texas Market Test Plan 051819" on the Texas Standard Electronic Transaction Working Group page on

The “FlighTrak Users Guide” is found on the Texas Retail Market Testing page of

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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