Dayzer v8.4 B149 is now available for download from CES-US portal. Released on 12/4/2025.

Released on 4/21/2026
(NEPOOL Transmission Database 2026-27.zip)
New New NEPOOL Transmission Database 2026-27 based on DA market model with new topology, units and PNODE mappings. See details included in the readme file.

Released on 4/20/2026
(SPP_Transmission_Database_2025_2027.zip)
New New SPP model updated for 2026_27 Planning year.  See readme for full details.

Released on 4/2/2026
(MISO Transmission Database 2026-27_Allocation.zip)
New New MISO Model based on 2026_2027 Annual Auction files. See readme for full detail.

Released on 3/16/2026
(PJMRTO_Transmission_Database_2026-27.zip)
New New PJM model based on 2026_27 Annual auction files. See readme for full details.

Released on 3/13/2026
(ERCOT Transmission Database MAR 2026 CRR AUCTION.zip)
New ERCOT Transmission Database MAR 2026 CRR AUCTION.mdb released with fundamentally new topology, new units, LDF, transmission projects, PNODEs, ratings, and constraints updated through 3-13-2026. New major feature included in script allowing users to refine/update LDF assumptions. See Readme file for additional details. Please make sure to replace both default.dzr and default.pfd before running.

Released on 2/16/2026
(PJMRTO_Transmission_Database_SEP_2025_Updated_II.zip)
Updated PJM model update to reflect Pruntytown Circuit-Breaker congestion. See readme for full details.

(posted on www.CES-US.com portal)