Just a reminder to all SPP Market Participants, Markets Release 1.21 testing is beginning on Tuesday, May 23rd. Detailed test cases for the Release 1.21 member-impacting changes are now available in SPP’s site (https://www.spp.org/spp-documents-filings/?id=98431). Also, don’t forget to register for the Markets 1.21 Testing Kick-Off Call on Tuesday, May 23rd! Registration can be found at https://www.spp.org/events/calendar/markets-release-121-testing-kick-off-teleconference-20170523/.