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The new versions of the software packages can be selected by using the jun26 tag in modules. For example:

module load ecmwf-toolbox/jun26
module load python3/jun26

How to revert to the old versions in case of problems AFTER the update

Users that experience problems with the new default software packages after the update will be able to revert to the old default versions. These can be selected with the commands:

module load ecmwf-toolbox/old
module load python3/old

Warning

Please let ECMWF know if you need to revert to the old version of any of the packages after the update of the defaults has taken place. 

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The new version of the ECMWF Toolbox (ecmwf-toolbox module) is 2026.04.0.0, replacing 2025.10.1.0. This table summarises the changes in the version of the different packages within the bundle:

PackageDefault versionRelease notesDownload page
BeforeAfter
CodesUI1.8.11.8.1CodesUI - Change HistoryCodesUI - Releases
ecCodes2.44.02.47.0

Latest news

Migration to GRIB2 - new in ecCodes 

ecCodes Releases
Magics4.16.04.16.1Latest NewsMagics Releases
Metview5.26.15.26.4

Release notes

Metview Releases

ODC1.6.0

1.6.3

READMEODC Releases

Besides ecmwf-toolbox, the following ECMWF packages with their corresponding module also see their default changed:

ecFlow5.13.45.16.0

Latest news

ecFlow Releases
Info
titleecFlow Servers update

General purpose ecFlow servers and those running Time-Critical Option 2 workloads will also be updated to run version 5.16.0.

Please see the Release notes for full details of the changes implemented in each package.

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Some of the versions in this list may already be the default for a specific package, so no changes will be made in those cases.

ModuleBeforeAfterRelease notes
adios22.10.22.11.9https://adios2.readthedocs.io/en/latest/
aec

1.1.3

1.1.6

https://gitlab.dkrz.de/k202009/libaec/-/blob/master/CHANGELOG.md
amd-fftw4.14.1https://github.com/amd/amd-fftw/blob/amd-fftw/ChangeLog
ansible

11.3.0

13.5.0

https://github.com/ansible-community/ansible-build-data/blob/main/7/CHANGELOG-v7.rst
antlr2.7.72.7.7https://www.antlr2.org/doc/
aocc4.0.04.0.0https://www.amd.com/en/developer/aocc.html
apptainer1.3.61.4.5https://github.com/apptainer/apptainer/blob/main/CHANGELOG.md
bison3.8.23.8.2https://fossies.org/linux/bison/ChangeLog
blis3.23.2https://github.com/amd/blis/blob/master/CHANGELOG
boost1.87.01.90.0https://www.boost.org/users/history/version_1_90_0.html
cdo2.5.12.6.0https://code.mpimet.mpg.de/projects/cdo/news
cgal5.6.26.1.1https://www.cgal.org/releases.html
cmake3.31.64.2.4https://cmake.org/cmake/help/latest/release/
cmor3.9.03.9.0https://cmor.llnl.gov/news/
coda2.25.52.25.6https://github.com/stcorp/coda/blob/master/CHANGES
conda24.11.3-226.1.1-3https://docs.conda.io/projects/conda/en/latest/release-notes.html
cppcheck2.17.02.20.0https://github.com/danmar/cppcheck/releases
darshan3.4.63.5.0https://www.mcs.anl.gov/research/projects/darshan/
doxygen1.13.21.15.0https://doxygen.nl/manual/changelog.html
eigen3.4.05.0.0https://github.com/njoy/eigen/blob/master/CHANGELOG.md
esmf8.8.08.9.1https://earthsystemmodeling.org/static/releases.html
extrae4.2.115.0.3https://github.com/bsc-performance-tools/extrae/blob/master/ChangeLog
fcm2021.05.02021.05.0https://github.com/metomi/fcm/blob/master/CHANGES.md
fdupes2.3.22.4.0https://github.com/adrianlopezroche/fdupes/releases
ferret7.6.37.6.3https://github.com/NOAA-PMEL/PyFerret/releases
ffmpeg7.1.18.1https://github.com/FFmpeg/FFmpeg/blob/master/Changelog
fftw3.3.103.3.10https://www.fftw.org/release-notes.html
fgsl1.6.01.6.0https://github.com/reinh-bader/fgsl/blob/master/NEWS
flex2.6.42.6.4

https://github.com/westes/flex/releases

gdal3.10.23.12.3https://github.com/OSGeo/gdal/blob/v3.12.3/NEWS.md
gdl1.1.11.1.1https://github.com/gnudatalanguage/gdl/releases
geocat2025.02.02026.03.0https://github.com/NCAR/geocat-comp
geos

3.13.1

3.14.1

https://github.com/libgeos/geos/releases
git2.48.12.53.0https://github.com/git/git
gitflow1.12.31.12.3https://github.com/petervanderdoes/gitflow-avh/releases/tag/1.12.3
github-cli2.68.12.89.0https://github.com/cli/cli/releases
gmt6.5.06.6.0https://docs.generic-mapping-tools.org/dev/changes.html
gnuparallel

20250222

20260322

https://www.gnu.org/software/parallel/
go1.24.11.26.2https://go.dev/doc/devel/release
gperf3.13.3

https://github.com/rurban/gperf/blob/master/ChangeLog

grace5.1.255.1.25https://plasma-gate.weizmann.ac.il/Grace/
grads2.1.a2.oga.12.1.a2.oga.1http://opengrads.org
grass8.4.18.4.2https://grass.osgeo.org/news/2025_11_27_grass_gis_8_4_2_released/
gsl2.82.8http://git.savannah.gnu.org/cgit/gsl.git/tree/NEWS
hdf4.3.04.3.0https://www.hdfgroup.org/2024/02/27/release-of-hdf-4-3-0-newsletter-201/
hdf5-parallel1.14.62.1.1https://github.com/HDFGroup/hdf5/releases
hdf51.14.62.1.1https://github.com/HDFGroup/hdf5/releases
hdfeos3.03.0https://wiki.earthdata.nasa.gov/display/DAS/Toolkit+Downloads
hdfview3.3.13.3.1https://www.hdfgroup.org/downloads/hdfview/
hpcx-openmpi2.9.02.9.0https://developer.nvidia.com/networking/hpc-x
iris3.11.13.15.0https://scitools-iris.readthedocs.io/en/latest/whatsnew/index.html
jasper4.2.44.2.9https://github.com/jasper-software/jasper/releases
java23.0.223.0.2https://www.oracle.com/java/technologies/javase/23-relnote-issues.html
julia1.11.41.12.5https://docs.julialang.org/en/v1/NEWS/
lcov2.32.4https://github.com/linux-test-project/lcov/releases
lftp4.9.34.9.3https://lftp.yar.ru/news.html
libflame3.13.1https://github.com/flame/libflame
libspatialindex2.1.02.1.0https://github.com/libspatialindex/libspatialindex/releases
libtensorflow2.18.02.18.0https://github.com/tensorflow/tensorflow/blob/master/RELEASE.md
maven3.9.93.9.14https://maven.apache.org/release-notes-all.html
mongodb8.0.58.2.6https://www.mongodb.com/docs/manual/release-notes/
nccmp1.9.1.01.10.0.0https://gitlab.com/remikz/nccmp
ncl6.6.26.6.2https://github.com/NCAR/ncl
nco5.3.25.3.7https://nco.sourceforge.net/highlights_old.shtml
ncview2.1.112.1.11http://meteora.ucsd.edu/~pierce/ncview_home_page.html
netcdf4-parallel4.9.34.10.0https://docs.unidata.ucar.edu/netcdf-c/current/RELEASE_NOTES.html
netcdf44.9.34.10.0https://docs.unidata.ucar.edu/netcdf-c/current/RELEASE_NOTES.html
ninja1.12.11.13.1https://github.com/ninja-build/ninja/releases
node22.14.024.14.1https://github.com/nodejs/node/releases
numdiff5.9.05.9.0https://www.nongnu.org/numdiff/
nvidia24.1125.11https://developer.nvidia.com/hpc-sdk
octave9.4.011.1.0https://octave.org/NEWS-11.html
onnxruntime1.21.01.21.0https://github.com/microsoft/onnxruntime
openblas0.3.290.3.32https://github.com/xianyi/OpenBLAS/releases
openjpeg2.5.32.5.4https://github.com/uclouvain/openjpeg/blob/v2.5.4/NEWS.md
panoply5.6.05.9.2https://www.giss.nasa.gov/tools/panoply/changelog.html
parmetis4.0.34.0.3http://glaros.dtc.umn.edu/gkhome/metis/parmetis/changes
patchelf0.17.20.17.2https://github.com/NixOS/patchelf/releases
pcraster4.4.2-014.4.2-01https://pcraster.geo.uu.nl
pdal2.8.32.10.1https://github.com/PDAL/PDAL/releases
petsc3.20.33.23.7https://gitlab.com/petsc/petsc
pnetcdf1.14.01.14.1https://github.com/Parallel-NetCDF/PnetCDF/blob/master/RELEASE_NOTES
postgres14.514.5https://www.postgresql.org
proj9.5.19.8.0https://proj.org/news.html
psutils1.171.17https://github.com/rrthomas/psutils
pycharm2024.3.42026.1https://www.jetbrains.com/pycharm/whatsnew/
pypy

3.10-v7.3.15-01

3.10-v7.3.15-01

https://doc.pypy.org/en/latest/index-of-release-notes.html
python33.12.1-013.13.13-01https://docs.python.org/3.12/whatsnew/changelog.html
qgis3.40.43.44.8https://www.qgis.org/en/site/forusers/visualchangelogs.html
qhull8.1-alpha18.1-alpha1http://www.qhull.org/news/qhull-news.html
qt6.6.16.6.1https://wiki.qt.io/Main
R4.4.34.5.3https://cran.r-project.org/doc/manuals/r-release/NEWS.html
rclone1.69.11.73.4https://rclone.org/changelog/
rstudio2024.12.1+5632024.12.1+563https://docs.posit.co/ide/news/
s3cmd2.4.02.4.0https://github.com/s3tools/s3cmd/releases
snakemake8.30.09.19.0https://snakemake.readthedocs.io/en/stable/project_info/history.html#changelog
sqlite3.49.13.51.3https://www.sqlite.org/changes.html
sqlitebrowser3.13.13.13.1https://github.com/sqlitebrowser/sqlitebrowser/releases
stat4.2.14.2.1https://github.com/LLNL/STAT
texlive20252026https://www.tug.org/texlive/
udunits2.2.282.2.28https://github.com/Unidata/UDUNITS-2
wgrib1.8.51.8.5https://www.cpc.ncep.noaa.gov/products/wesley/wgrib.html
wgrib23.6.03.9.0https://www.cpc.ncep.noaa.gov/products/wesley/wgrib2/
wreport3.37-13.40-2

https://github.com/ARPA-SIMC/wreport/releases

wxparaver4.12.04.12.0https://github.com/bsc-performance-tools/wxparaver
xconv1.941.94https://ncas-cms.github.io/xconv-doc/html/index.html

Potential issues

ecFlow and python3 incompatibilities

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