# Latest

**URL:** https://discourse.julialang.org/latest.md?page=139

[Latest](https://discourse.julialang.org/latest.md) · [Categories](https://discourse.julialang.org/categories.md) · [Tags](https://discourse.julialang.org/tags.md)

**Page:** 140

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## [\`\`\`julia -t\`\`\` Does not respect the number of threads](https://discourse.julialang.org/t/julia-t-does-not-respect-the-number-of-threads/130533)

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**Author:** [@Dario-Rosa85](https://discourse.julialang.org/u/Dario-Rosa85)\
**Replies:** 13\
**Last updated:** [July 7, 2025, 3:49pm UTC](https://discourse.julialang.org/t/julia-t-does-not-respect-the-number-of-threads/130533 "2025-07-07T15:49:54Z")

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Hi all, I am running some large-scale multithreading numerical code on a couple of different servers. In one of them (and only in one) I am seeing that the machine does not obey the restriction on the number of threads …

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## [Help Me Drive an E-Ink Display on a Raspberry Pi Using Julia!](https://discourse.julialang.org/t/help-me-drive-an-e-ink-display-on-a-raspberry-pi-using-julia/123972)

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**Author:** [@TheCedarPrince](https://discourse.julialang.org/u/TheCedarPrince)\
**Replies:** 19\
**Last updated:** [July 7, 2025, 3:30pm UTC](https://discourse.julialang.org/t/help-me-drive-an-e-ink-display-on-a-raspberry-pi-using-julia/123972 "2025-07-07T15:30:18Z")

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Hi folks! :wave: I am on a quest to use Julia to drive an E-Ink Display that I am running from a Raspberry Pi 4 (Raspbian OS 64-bit). Here is an image of what I would like to be seeing happen: This is using a Python l…

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## [Review papers on the growing adoption of Julia for scientific computing and/or HPC?](https://discourse.julialang.org/t/review-papers-on-the-growing-adoption-of-julia-for-scientific-computing-and-or-hpc/130369)

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**Author:** [@Oblomov](https://discourse.julialang.org/u/Oblomov)\
**Replies:** 4\
**Last updated:** [July 7, 2025, 2:40pm UTC](https://discourse.julialang.org/t/review-papers-on-the-growing-adoption-of-julia-for-scientific-computing-and-or-hpc/130369 "2025-07-07T14:40:52Z")

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Hello all, we’re currently writing a manuscript on our experience improving a cellular automaton model for fire propagation that will include also a section on the benefits of porting from Python (the language the origi…

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## [How to move .julia directory to another partition in GNU/Linux?](https://discourse.julialang.org/t/how-to-move-julia-directory-to-another-partition-in-gnu-linux/103258)

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**Author:** [@archisman](https://discourse.julialang.org/u/archisman)\
**Replies:** 4\
**Last updated:** [July 7, 2025, 2:19pm UTC](https://discourse.julialang.org/t/how-to-move-julia-directory-to-another-partition-in-gnu-linux/103258 "2025-07-07T14:19:34Z")

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I am using Julia on a Chromebook running Ubuntu. The computer has very limited internal storage (only 32 GB), and I want to move the .julia directory to a microSD card, because it consumes several gigabytes of space. Th…

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## [Memory corruption error in Julia: "Incorrect checksum for freed object" when running a JuMP/Gurobi model](https://discourse.julialang.org/t/memory-corruption-error-in-julia-incorrect-checksum-for-freed-object-when-running-a-jump-gurobi-model/130522)

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**Author:** [@leonie25](https://discourse.julialang.org/u/leonie25)\
**Replies:** 5\
**Last updated:** [July 7, 2025, 5:15am UTC](https://discourse.julialang.org/t/memory-corruption-error-in-julia-incorrect-checksum-for-freed-object-when-running-a-jump-gurobi-model/130522 "2025-07-07T05:15:04Z")

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I am encountering a memory corruption error when running my optimization model using JuMP with the Gurobi solver in Julia. The error message is as follows: julia(30498,0x2012a5f00) malloc: Incorrect checksum for freed o…

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## [Version-named manifests by default?](https://discourse.julialang.org/t/version-named-manifests-by-default/123618)

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**Author:** [@Eben60](https://discourse.julialang.org/u/Eben60)\
**Replies:** 10\
**Last updated:** [July 7, 2025, 4:55am UTC](https://discourse.julialang.org/t/version-named-manifests-by-default/123618 "2025-07-07T04:55:45Z")

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Julia 1.11 supports versioning by manifests, but one has first to manually rename the manifest to use this feature. Should not all newly created manifests be created with the versioned name?

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## [FINAL DAY: Monday July 7 - Last Day to Complete the 2025 Julia User & Developer Survey](https://discourse.julialang.org/t/final-day-monday-july-7-last-day-to-complete-the-2025-julia-user-developer-survey/130528)

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**Author:** [@ahclaster](https://discourse.julialang.org/u/ahclaster)\
**Replies:** 0\
**Last updated:** [July 7, 2025, 2:07am UTC](https://discourse.julialang.org/t/final-day-monday-july-7-last-day-to-complete-the-2025-julia-user-developer-survey/130528 "2025-07-07T02:07:24Z")

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Monday July 7 is the LAST DAY to participate in the 2025 Julia User & Developer Survey. Click here to complete. Results will be presented at JuliaCon 2025 and will be available online.

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## [Deadline: Complete the 2025 Julia User & Developer Survey by Monday July 7](https://discourse.julialang.org/t/deadline-complete-the-2025-julia-user-developer-survey-by-monday-july-7/130430)

<div class="topic-metadata">

**Author:** [@ahclaster](https://discourse.julialang.org/u/ahclaster)\
**Replies:** 2\
**Last updated:** [July 7, 2025, 2:05am UTC](https://discourse.julialang.org/t/deadline-complete-the-2025-julia-user-developer-survey-by-monday-july-7/130430 "2025-07-07T02:05:00Z")

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Please complete the 2025 Julia User & Developer Survey by Monday July 7. Results will be presented at JuliaCon later this month and will also be available online. Click here to participate. Please forward to friends and …

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## [EnsembleSummary of SDEProblem with output\_func gives incorrect dimensions](https://discourse.julialang.org/t/ensemblesummary-of-sdeproblem-with-output-func-gives-incorrect-dimensions/130516)

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**Author:** [@Rodrigo\_Zepeda](https://discourse.julialang.org/u/Rodrigo_Zepeda)\
**Replies:** 2\
**Last updated:** [July 7, 2025, 12:06am UTC](https://discourse.julialang.org/t/ensemblesummary-of-sdeproblem-with-output-func-gives-incorrect-dimensions/130516 "2025-07-07T00:06:14Z")

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I’m using DifferentialEquations.jl to solve an SDEProblem with a custom output\_func. I am then trying to summarize multiple trajectories with EnsembleSummary. However, the resulting summary has the wrong dimensions for t…

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## [Solving a large scale MILP problem with cplex takes long time](https://discourse.julialang.org/t/solving-a-large-scale-milp-problem-with-cplex-takes-long-time/130491)

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**Author:** [@JOHN1](https://discourse.julialang.org/u/JOHN1)\
**Replies:** 3\
**Last updated:** [July 6, 2025, 9:24pm UTC](https://discourse.julialang.org/t/solving-a-large-scale-milp-problem-with-cplex-takes-long-time/130491 "2025-07-06T21:24:44Z")

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i am solving a large scale MILP problem with cplex, it takes too much time and cannot obtain the sollution, does it means that cplex is not suitable for this large scale MILP problem? what can i do to acceralate the solv…

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## [Confusion in The return Keyword](https://discourse.julialang.org/t/confusion-in-the-return-keyword/130525)

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**Author:** [@raman\_kumar](https://discourse.julialang.org/u/raman_kumar)\
**Replies:** 4\
**Last updated:** [July 6, 2025, 7:32pm UTC](https://discourse.julialang.org/t/confusion-in-the-return-keyword/130525 "2025-07-06T19:32:59Z")

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In this code given in Julia documentation i got following results. Is there some discrepancy? julia\> function hypot(x, y) x = abs(x) y = abs(y) if x \> y r = y/x …

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## [\[ANN\] CensusACS a Julia API to the U.S. Census Bureau's American Community Survey](https://discourse.julialang.org/t/ann-censusacs-a-julia-api-to-the-u-s-census-bureaus-american-community-survey/130514)

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**Author:** [@technocrat](https://discourse.julialang.org/u/technocrat)\
**Replies:** 1\
**Last updated:** [July 6, 2025, 7:25pm UTC](https://discourse.julialang.org/t/ann-censusacs-a-julia-api-to-the-u-s-census-bureaus-american-community-survey/130514 "2025-07-06T19:25:18Z")

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A Julia package for retrieving data from the U.S. Census Bureau’s American Community Survey (ACS) API. This is based on the R tidycensus package by Kyle Walker (GitHub - walkerke/tidycensus: Load US Census boundary and a…

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## [VSCode package autocompletion doesnt work if package is not declared in that cell](https://discourse.julialang.org/t/vscode-package-autocompletion-doesnt-work-if-package-is-not-declared-in-that-cell/130500)

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**Author:** [@FabrizioTorrico](https://discourse.julialang.org/u/FabrizioTorrico)\
**Replies:** 1\
**Last updated:** [July 6, 2025, 7:15pm UTC](https://discourse.julialang.org/t/vscode-package-autocompletion-doesnt-work-if-package-is-not-declared-in-that-cell/130500 "2025-07-06T19:15:37Z")

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Im new to julia coming from python. I wanted to do some analysis so i add some packages in jupyter notebook. using Pkg Pkg.activate(".") Pkg.add(\["IJulia", "DataFrames", "CSV", "CairoMakie", "StatsBase", "Stat…

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## [UniversalKriging, gauged precipiation interpolation with dem as a covariate](https://discourse.julialang.org/t/universalkriging-gauged-precipiation-interpolation-with-dem-as-a-covariate/130519)

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**Author:** [@kongdd](https://discourse.julialang.org/u/kongdd)\
**Replies:** 1\
**Last updated:** [July 6, 2025, 6:54pm UTC](https://discourse.julialang.org/t/universalkriging-gauged-precipiation-interpolation-with-dem-as-a-covariate/130519 "2025-07-06T18:54:16Z")

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The following script is the UniversalKriging script gived by grok 3.5, which is trying to interpolate gauged precipiation with dem as a covariate. Any idea how to achieve this in Julia? import numpy as np from pykrige.…

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## [Gurobi gets stuck after "Loaded MIP start from previous solve"](https://discourse.julialang.org/t/gurobi-gets-stuck-after-loaded-mip-start-from-previous-solve/130406)

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**Author:** [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)\
**Replies:** 13\
**Last updated:** [July 6, 2025, 5:34am UTC](https://discourse.julialang.org/t/gurobi-gets-stuck-after-loaded-mip-start-from-previous-solve/130406 "2025-07-06T05:34:33Z")

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I’m writing the Benders’ decomposition for an MIP and encountering a very weird behavior of Gurobi. There is an MIP that I need to modify its obj and repeatedly re-solve (Gurobi can (according to its Logging) Loaded MIP…

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## [How to get dipole moments for a molecule in Atomic Orbital basis within the Julia ecosystem?](https://discourse.julialang.org/t/how-to-get-dipole-moments-for-a-molecule-in-atomic-orbital-basis-within-the-julia-ecosystem/130436)

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**Author:** [@Uranium238](https://discourse.julialang.org/u/Uranium238)\
**Replies:** 1\
**Last updated:** [July 6, 2025, 6:33am UTC](https://discourse.julialang.org/t/how-to-get-dipole-moments-for-a-molecule-in-atomic-orbital-basis-within-the-julia-ecosystem/130436 "2025-07-06T06:33:33Z")

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I am trying to develop an implementation of a certain electronic structure method within Julia aimed at modelling strong light-matter interactions. The method is closely related to the widely popular Hartree-Fock method.…

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## [NeuralPDE on GPU throws NaNs when I use a source term elevated to some power](https://discourse.julialang.org/t/neuralpde-on-gpu-throws-nans-when-i-use-a-source-term-elevated-to-some-power/114048)

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**Author:** [@PetrosStefanou](https://discourse.julialang.org/u/PetrosStefanou)\
**Replies:** 2\
**Last updated:** [July 6, 2025, 1:20am UTC](https://discourse.julialang.org/t/neuralpde-on-gpu-throws-nans-when-i-use-a-source-term-elevated-to-some-power/114048 "2025-07-06T01:20:00Z")

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Hello to everyone, I have a problem with NeuralPDE when trying to use the GPU on the following problem using NeuralPDE using Optimization, OptimizationOptimJL, OptimizationOptimisers import ModelingToolkit: Interval us…

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## [Study neutron star interior using DFTK.jl](https://discourse.julialang.org/t/study-neutron-star-interior-using-dftk-jl/130487)

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**Author:** [@raman\_kumar](https://discourse.julialang.org/u/raman_kumar)\
**Replies:** 1\
**Last updated:** [July 5, 2025, 1:27pm UTC](https://discourse.julialang.org/t/study-neutron-star-interior-using-dftk-jl/130487 "2025-07-05T13:27:15Z")

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I want to study nuclear matter within neutron stars and how nuclei move through the super-fluid neutron medium within neutron star crusts. I would like to study crucial details like effective mass, dissipative mechanisms…

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## [Why does padding around plots get increasingly large when there are more subplots?](https://discourse.julialang.org/t/why-does-padding-around-plots-get-increasingly-large-when-there-are-more-subplots/130503)

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**Author:** [@miles-1](https://discourse.julialang.org/u/miles-1)\
**Replies:** 1\
**Last updated:** [July 5, 2025, 11:40pm UTC](https://discourse.julialang.org/t/why-does-padding-around-plots-get-increasingly-large-when-there-are-more-subplots/130503 "2025-07-05T23:40:53Z")

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I’m trying to make a single figure that is very long with many subplots. However, plotting behavior seems to change the larger the image gets. Specifically, the padding between the plots and the axes’ number labels seem …

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## [Reusing variables with Zygote?](https://discourse.julialang.org/t/reusing-variables-with-zygote/130498)

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**Author:** [@MatPeron](https://discourse.julialang.org/u/MatPeron)\
**Replies:** 0\
**Last updated:** [July 5, 2025, 5:58pm UTC](https://discourse.julialang.org/t/reusing-variables-with-zygote/130498 "2025-07-05T17:58:37Z")

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I’ve written a module to perform some physics computations, and have been trying to make it autodifferentiable so I can run it with stuff like Hamilonian Monte Carlo. The computation is specifically about perturbation th…

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## [Duals and constraint names for \`PowerModels\` and \`InfrastructureModels\`](https://discourse.julialang.org/t/duals-and-constraint-names-for-powermodels-and-infrastructuremodels/130311)

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**Author:** [@jacob-roth](https://discourse.julialang.org/u/jacob-roth)\
**Replies:** 5\
**Last updated:** [July 5, 2025, 4:32pm UTC](https://discourse.julialang.org/t/duals-and-constraint-names-for-powermodels-and-infrastructuremodels/130311 "2025-07-05T16:32:44Z")

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I would like to (1) use PowerModels to construct a base DCOPF model and (2) make some modifications to the model (such as allowing load shed by adding new variables and modifying cosntraints). Beginning with an instance …

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## [How to stop array slice being flattened](https://discourse.julialang.org/t/how-to-stop-array-slice-being-flattened/130494)

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**Author:** [@user664303](https://discourse.julialang.org/u/user664303)\
**Replies:** 2\
**Last updated:** [July 5, 2025, 4:03pm UTC](https://discourse.julialang.org/t/how-to-stop-array-slice-being-flattened/130494 "2025-07-05T16:03:51Z")

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Julia is removing singular dimensions when I slice an array: A = reshape(\[2 2 2 2\], 2, 1, 2) A\[1,1,:\] 2-element Vector{Int64}: 2 2 If I want A to remain a 1x1x2 array, is there anything I can do other than reshape it…

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## [Issues with DifferentialEquations compiling](https://discourse.julialang.org/t/issues-with-differentialequations-compiling/126497)

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**Author:** [@matyaspayn](https://discourse.julialang.org/u/matyaspayn)\
**Replies:** 30\
**Last updated:** [July 5, 2025, 10:56am UTC](https://discourse.julialang.org/t/issues-with-differentialequations-compiling/126497 "2025-07-05T10:56:34Z")

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Hello, I am currently learning Julia for my bachelor thesis and have ran into a problem with using DifferentialEquations. When I try to compile DifferentialEquations, these four dependencies error and I cannot see t…

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## [Performance discrepancy in solving sparse SPD\\dense rhs between X86 and Apple M](https://discourse.julialang.org/t/performance-discrepancy-in-solving-sparse-spd-dense-rhs-between-x86-and-apple-m/130476)

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**Author:** [@pitsianis](https://discourse.julialang.org/u/pitsianis)\
**Replies:** 2\
**Last updated:** [July 4, 2025, 8:06pm UTC](https://discourse.julialang.org/t/performance-discrepancy-in-solving-sparse-spd-dense-rhs-between-x86-and-apple-m/130476 "2025-07-04T20:06:43Z")

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Why do I observe a 9x difference in elapsed times when I run the following on my macbook laptop using Random, SparseArrays, LinearAlgebra Random.seed!(0); A = sprand(10000,10000,5/10000) + I; A = max.(A,A'); b = rand(…

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## [DocumenterVitepress light and dark mode images/figures](https://discourse.julialang.org/t/documentervitepress-light-and-dark-mode-images-figures/130477)

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**Author:** [@cneverett](https://discourse.julialang.org/u/cneverett)\
**Replies:** 0\
**Last updated:** [July 4, 2025, 7:03pm UTC](https://discourse.julialang.org/t/documentervitepress-light-and-dark-mode-images-figures/130477 "2025-07-04T19:03:16Z")

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Hello, I am using DocumenterVitepress.jl to generate some documentation for a package I am developing. I have generated both light and dark mode versions of figures (saved as png) that I would like to include in the doc…

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## [PlutoPages.jl in Windows](https://discourse.julialang.org/t/plutopages-jl-in-windows/129710)

<div class="topic-metadata">

**Author:** [@eduardovrs](https://discourse.julialang.org/u/eduardovrs)\
**Replies:** 6\
**Last updated:** [July 4, 2025, 5:36pm UTC](https://discourse.julialang.org/t/plutopages-jl-in-windows/129710 "2025-07-04T17:36:38Z")

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Hello there, I’m trying to make a some interactive notebooks with Pluto, and I want an index similar to Computational Thinking Course, and have found PlutoPages.jl but it doesn’t work on Windows locally. julia\> output\_…

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## [Converting to modules: Julia users should count themselves lucky](https://discourse.julialang.org/t/converting-to-modules-julia-users-should-count-themselves-lucky/130474)

<div class="topic-metadata">

**Author:** [@PetrKryslUCSD](https://discourse.julialang.org/u/PetrKryslUCSD)\
**Replies:** 0\
**Last updated:** [July 4, 2025, 5:09pm UTC](https://discourse.julialang.org/t/converting-to-modules-julia-users-should-count-themselves-lucky/130474 "2025-07-04T17:09:52Z")

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Interesting account of the conversion of a (part of) large C++ library to the 20-standard modules: Experience converting a large mathematical software package written in C++ to C++20 modules I think we Julians have it q…

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## [Repeated allocations for fft in pseudospectral code](https://discourse.julialang.org/t/repeated-allocations-for-fft-in-pseudospectral-code/130472)

<div class="topic-metadata">

**Author:** [@gideonsimpson](https://discourse.julialang.org/u/gideonsimpson)\
**Replies:** 1\
**Last updated:** [July 4, 2025, 4:37pm UTC](https://discourse.julialang.org/t/repeated-allocations-for-fft-in-pseudospectral-code/130472 "2025-07-04T16:37:44Z")

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I’m trying to tune a pseudospectral PDE code which has calls to fft and ifft at every iteration. I was wondering if there was some way to reduce the repeated memory allocations (assuming this improves performance). By …

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## [New ROOT.jl release, v0.3.3](https://discourse.julialang.org/t/new-root-jl-release-v0-3-3/130409)

<div class="topic-metadata">

**Author:** [@grasph](https://discourse.julialang.org/u/grasph)\
**Replies:** 3\
**Last updated:** [July 4, 2025, 12:34pm UTC](https://discourse.julialang.org/t/new-root-jl-release-v0-3-3/130409 "2025-07-04T12:34:35Z")

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Hello, I am glad to announce you the first ROOT.jl release that uses the Julia package manager to automatically install the ROOT binaries (aka \_jll package). The release includes now by default the full set of ROOT cla…

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## [\[BinaryBuiler\] Mix of host and target libraries in host sysroot](https://discourse.julialang.org/t/binarybuiler-mix-of-host-and-target-libraries-in-host-sysroot/130470)

<div class="topic-metadata">

**Author:** [@grasph](https://discourse.julialang.org/u/grasph)\
**Replies:** 2\
**Last updated:** [July 4, 2025, 11:27am UTC](https://discourse.julialang.org/t/binarybuiler-mix-of-host-and-target-libraries-in-host-sysroot/130470 "2025-07-04T11:27:07Z")

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Hello, While trying to build R/ROOT for arm architectures, I’ve found that /opt/x86\_64-linux-musl/x86\_64-linux-musl/sys-root/usr/local points to /workspace/destdir. The results is that /opt/x86\_64-linux-musl/x86\_64-li…

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