• Decommission legacy Optimizer input file cme_rloptimizercfg_yyyymmdd.zip starting September 13, 2021

      • To
      • Clearing Member Firms; Optimizer Users
      • From
      • CME Clearing
      • #
      • 21-312
      • Notice Date
      • 08 September 2021
      • Effective Date
      • 13 September 2021

    • CME is decommissioning a legacy Optimizer software input file, the cme_rloptimizercfg_yyymmdd.zip file. This file was deprecated as a required file to run prior versions of Optimizer software and was replaced when CME released Optimizer Version 15 in October of 2020. There are no other uses for this file. This file will cease publication on September 13, 2021.

      Click here for the full text of the advisory

      21-312

CME Group is the world’s leading derivatives marketplace. The company is comprised of four Designated Contract Markets (DCMs). 
Further information on each exchange's rules and product listings can be found by clicking on the links to CME, CBOT, NYMEX and COMEX.

© 2025 CME Group Inc. All rights reserved.