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root_v6.40.04.win64.python314.vc18.exe 2026-08-27 165.0 MB
root_v6.40.04.win64.python314.vc18.relwithdebinfo.exe 2026-08-27 468.7 MB
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root_v6.40.04.source.tar.gz 2026-08-27 343.5 MB
README.md 2026-08-27 4.0 kB
v6-40-04 source code.tar.gz 2026-08-27 343.6 MB
v6-40-04 source code.zip 2026-08-27 361.2 MB
Totals: 26 Items   9.3 GB 0

A patch of the 6.40 release series. A few items were addressed: see list below.

Items addressed for this release

  • #23036 - system.rootrc ships three settings that nothing reads (WebGui.HttpLoopback, WebGui.WaitForTmout, Browser.StartUrl)
  • #23026 - ROOT fails to configure with CMake 4.4
  • #22981 - [ntuple] streamer field end up using wrong type name
  • #22959 - [RF] Bug with RooExtendPdf produces inconsistency in rf204b_extendedLikelihood_rangedFit.C between before 6.26 and after 6.28
  • #22938 - R__memcompress fails with limited stack size
  • #22858 - [RF] RooBinIntegreator gives wrong result for integrals that cut thought bin boundaries
  • #22855 - [ntuple] double free when resizing small RVec
  • #22843 - TMath::Laplacian computes wrong finite differences
  • #22831 - TGDMLParse silently drops elements whose name collides with a material name after 0x pointer-suffix stripping
  • #22769 - Histogram with fit function not correctly drawn to canvas in Jupyter notebook with JsROOT on
  • #22727 - [jsroot] Scroll breaks on SWAN when using %rootbrowse
  • #22692 - Providing analytical Hessian reduces robustness of minimization to initial values in Minuit2
  • #22656 - [rootcling] external software no longer compiles with ROOT 6.40 (regression)
  • #22501 - THttpServer/TRootSniffer: exe.json leaks the object returned by the executed method (e.g. TH2::ProjectionY)
  • #22473 - [tmva][sofie] Conv generates invalid code and crashes for dilation > 1
  • #22395 - TGeoTessellated volumes read from GDML impossible to be closed (6.40.00 regression)
  • #22359 - "Second registration of" error with a template argument "missing"
  • #21402 - [RF] Building of Histograms/Errors from a workspace with a region with many bins is super slow
  • #20697 - [RF] Add support to set the nominal value and limits for the ShapeFactor parameters in HistFactory
  • #20116 - Wrong integrals for RooHistPdf with interpolation order = 1
  • #20018 - ROOT.TColor.DefinedColors(1) problematic in jupyter notebooks
  • #19560 - TTreeIndex fails under Valgrind due to long double emulation
  • #18683 - [RF] Parallelize per-channel workspace creation in MakeModelAndMeasurementsFast
  • #17483 - wsl2 menu display issue
  • #14255 - [RF] Asymmetry plots with RooFit
  • #10784 - TKDTreeBinning missing bins
  • #10240 - TTree: Creating a branch with std::vector can raise an internal error when mixing I/O systems.
  • #6378 - TTreeFormula Alt$ gives (silently) wrong result when used by itself.
Source: README.md, updated 2026-08-27