# Latest

**URL:** https://discourse.julialang.org/latest.md?page=89

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

**Page:** 90

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## [Examples of dynamical physical systems with exogenous inputs described by UDEs](https://discourse.julialang.org/t/examples-of-dynamical-physical-systems-with-exogenous-inputs-described-by-udes/133373)

<div class="topic-metadata">

**Author:** [@Emil\_Martinsen](https://discourse.julialang.org/u/Emil_Martinsen)\
**Replies:** 4\
**Last updated:** [October 31, 2025, 12:55pm UTC](https://discourse.julialang.org/t/examples-of-dynamical-physical-systems-with-exogenous-inputs-described-by-udes/133373 "2025-10-31T12:55:21Z")

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Can anyone point me to some good examples (code, papers, tutorials) of a dynamical physical system that are modelled with UDEs, i.e., ODEs where parts are known and other parts are unknown and modelled by a neural networ…

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## [DataAugmentation error with masks](https://discourse.julialang.org/t/dataaugmentation-error-with-masks/133574)

<div class="topic-metadata">

**Author:** [@cirobr](https://discourse.julialang.org/u/cirobr)\
**Replies:** 0\
**Last updated:** [October 31, 2025, 11:31am UTC](https://discourse.julialang.org/t/dataaugmentation-error-with-masks/133574 "2025-10-31T11:31:23Z")

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Cheers, I’m receiving an error when augmenting masks prior to training a model for semantic segmentation. Consider img as RGB image matrix. Consider mask as a matrix with integer elements from 1 to 11. Code is as follow…

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## [Zlib1.dll is missing while testing on Julia 1.5](https://discourse.julialang.org/t/zlib1-dll-is-missing-while-testing-on-julia-1-5/49731)

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**Author:** [@barleyman99](https://discourse.julialang.org/u/barleyman99)\
**Replies:** 4\
**Last updated:** [October 31, 2025, 8:59am UTC](https://discourse.julialang.org/t/zlib1-dll-is-missing-while-testing-on-julia-1-5/49731 "2025-10-31T08:59:10Z")

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Today I got an error while testing on my Windows 10 on Julia 1.5. It says that Zlib1.dll is missing. Any quick fix for this?

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## [Tmap usage with views](https://discourse.julialang.org/t/tmap-usage-with-views/133556)

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**Author:** [@jacobga](https://discourse.julialang.org/u/jacobga)\
**Replies:** 2\
**Last updated:** [October 31, 2025, 8:04am UTC](https://discourse.julialang.org/t/tmap-usage-with-views/133556 "2025-10-31T08:04:57Z")

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Hello, I am trying to use tmap! from OhMyThreads.jl on a view of an array. When running the code normally, it works fine, but it fails in testing when run with check\_bounds=yes, because views have cartesian index style.…

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## [\[Gtk4\] @sigatom](https://discourse.julialang.org/t/gtk4-sigatom/133562)

<div class="topic-metadata">

**Author:** [@AdamWysokinski](https://discourse.julialang.org/u/AdamWysokinski)\
**Replies:** 3\
**Last updated:** [October 31, 2025, 7:45am UTC](https://discourse.julialang.org/t/gtk4-sigatom/133562 "2025-10-31T07:45:49Z")

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This works in Gtk.jl: using Gtk win = GtkWindow("test") g = GtkGrid() sb = GtkSpinButton(1, 10, 1) s = GtkScale(false, 1, 10, 1) g\[1, 1\] = sb g\[1, 2\] = s push!(win, g) showall(win) signal\_connect(s, "value\_changed") do …

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## [Request error on package install (Pkg.add) at my company environment](https://discourse.julialang.org/t/request-error-on-package-install-pkg-add-at-my-company-environment/133570)

<div class="topic-metadata">

**Author:** [@KNK12287\_kaneka](https://discourse.julialang.org/u/KNK12287_kaneka)\
**Replies:** 1\
**Last updated:** [October 31, 2025, 7:25am UTC](https://discourse.julialang.org/t/request-error-on-package-install-pkg-add-at-my-company-environment/133570 "2025-10-31T07:25:13Z")

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I am using Julia (Version 1.12.1) at my company. When I tried to install the package SymbolicRegression, I was encountered by error shown below. I asked our IT team to make it possible to access… However, after the …

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## [AD of UDEs - how to set it up?](https://discourse.julialang.org/t/ad-of-udes-how-to-set-it-up/133461)

<div class="topic-metadata">

**Author:** [@Emil\_Martinsen](https://discourse.julialang.org/u/Emil_Martinsen)\
**Replies:** 13\
**Last updated:** [October 31, 2025, 7:13am UTC](https://discourse.julialang.org/t/ad-of-udes-how-to-set-it-up/133461 "2025-10-31T07:13:44Z")

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Hi! Im new to Julia and SciML but I am really curious to see how combining ODE’s with neural network could improve the predictive performance of the model we are developing for solvent-based CO2 capture. My current setu…

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## [Lumped beam model](https://discourse.julialang.org/t/lumped-beam-model/128512)

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**Author:** [@yjr](https://discourse.julialang.org/u/yjr)\
**Replies:** 8\
**Last updated:** [October 30, 2025, 10:52pm UTC](https://discourse.julialang.org/t/lumped-beam-model/128512 "2025-10-30T22:52:45Z")

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Hello, I’m trying to implement a 2D lumped beam model with modelingtoolkit. Using the small angle approximation, I managed to have something working with 5 elements. But increasing the number of elements to 6 make ODEPr…

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## [How to install jhrmstoolbox.jl in Julia; libmbedtls.so.12 not found](https://discourse.julialang.org/t/how-to-install-jhrmstoolbox-jl-in-julia-libmbedtls-so-12-not-found/133504)

<div class="topic-metadata">

**Author:** [@Monicate](https://discourse.julialang.org/u/Monicate)\
**Replies:** 5\
**Last updated:** [October 30, 2025, 8:05pm UTC](https://discourse.julialang.org/t/how-to-install-jhrmstoolbox-jl-in-julia-libmbedtls-so-12-not-found/133504 "2025-10-30T20:05:33Z")

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Hello, I’m so sorry for spamming questions. I’m trying to install a package like this: using Pkg Add prerequisite packages Pkg.add(PackageSpec(url=“Bitbucket”)) As the Bitbucket page suggests: Denice\_van\_Herwerden / j…

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## [Self Contained Apptainer Images](https://discourse.julialang.org/t/self-contained-apptainer-images/133529)

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**Author:** [@Gavin-Rockwood](https://discourse.julialang.org/u/Gavin-Rockwood)\
**Replies:** 3\
**Last updated:** [October 30, 2025, 6:36pm UTC](https://discourse.julialang.org/t/self-contained-apptainer-images/133529 "2025-10-30T18:36:13Z")

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I have been trying to get a self contained apptainer image, where all the packages are saved within a directory within the container (such as /usr/local/julia/) instead of a directory on the host (usually /.julia) in ord…

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## [C Contiguous Array in PyCall](https://discourse.julialang.org/t/c-contiguous-array-in-pycall/133559)

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**Author:** [@Frauke](https://discourse.julialang.org/u/Frauke)\
**Replies:** 2\
**Last updated:** [October 30, 2025, 6:19pm UTC](https://discourse.julialang.org/t/c-contiguous-array-in-pycall/133559 "2025-10-30T18:19:45Z")

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Hey everyone, I am trying to communicate with a National Instrument DAQ via PyCall.jl and the NI Python library nidaqmx. For some functions I have to pass a C contiguous array (flag C\_CONTIGUOUS has to be true). I trie…

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## [\[ANN\] LowLevelFEM.jl – Engineering-oriented FEM in pure Julia](https://discourse.julialang.org/t/ann-lowlevelfem-jl-engineering-oriented-fem-in-pure-julia/133561)

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**Author:** [@perebalazs](https://discourse.julialang.org/u/perebalazs)\
**Replies:** 0\
**Last updated:** [October 30, 2025, 6:12pm UTC](https://discourse.julialang.org/t/ann-lowlevelfem-jl-engineering-oriented-fem-in-pure-julia/133561 "2025-10-30T18:12:40Z")

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LowLevelFEM.jl is a lightweight finite element toolbox written entirely in Julia. It focuses on engineering-oriented workflows — boundary conditions, meshing with Gmsh, mechanical and thermo-mechanical analyses, and di…

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## [Best way for passing abstract type data via path variables in Dyad](https://discourse.julialang.org/t/best-way-for-passing-abstract-type-data-via-path-variables-in-dyad/132966)

<div class="topic-metadata">

**Author:** [@junsin0106](https://discourse.julialang.org/u/junsin0106)\
**Replies:** 4\
**Last updated:** [October 30, 2025, 5:55pm UTC](https://discourse.julialang.org/t/best-way-for-passing-abstract-type-data-via-path-variables-in-dyad/132966 "2025-10-30T17:55:02Z")

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Hello, I have a question about the proper usage of path variables in MTK and Dyad. To calculate heat transfer coefficient(HTC) and pressure drop(dP), the specific type and geometry of the heat exchanger(HX) are crucial…

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## [How to extract location from Strided GeoTIFF raster?](https://discourse.julialang.org/t/how-to-extract-location-from-strided-geotiff-raster/124973)

<div class="topic-metadata">

**Author:** [@cshen](https://discourse.julialang.org/u/cshen)\
**Replies:** 14\
**Last updated:** [October 30, 2025, 4:32pm UTC](https://discourse.julialang.org/t/how-to-extract-location-from-strided-geotiff-raster/124973 "2025-10-30T16:32:44Z")

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Hello, I’ve been trying to read some geotiff datasets. Reading it with GeoTIFF.jl results in a GeoTIFF.GeoTIFFImageIterator{TiffImages.StridedTaggedImage{...}}}. This case is not really documented anywhere neither in G…

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## [C program embedding Julia - works in terminal but breaks in pipes](https://discourse.julialang.org/t/c-program-embedding-julia-works-in-terminal-but-breaks-in-pipes/86973)

<div class="topic-metadata">

**Author:** [@greatpet](https://discourse.julialang.org/u/greatpet)\
**Replies:** 8\
**Last updated:** [October 30, 2025, 2:43pm UTC](https://discourse.julialang.org/t/c-program-embedding-julia-works-in-terminal-but-breaks-in-pipes/86973 "2025-10-30T14:43:19Z")

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I’d like to write a C program which embeds Julia code, and call this C program from an unrelated program using two-way pipes. While the C program works fine in the terminal, it breaks when called from pipes. Here’s a min…

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## [Robust solver for ℝ³ → ℝ³ root with flat parts](https://discourse.julialang.org/t/robust-solver-for-root-with-flat-parts/133481)

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**Author:** [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)\
**Replies:** 5\
**Last updated:** [October 30, 2025, 2:40pm UTC](https://discourse.julialang.org/t/robust-solver-for-root-with-flat-parts/133481 "2025-10-30T14:40:21Z")

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I have an ℝ³ → ℝ³ function f which is differentiable (the computation uses an implicit solution, but I implemented the derivatives for Enzyme.jl, Mooncake.jl, and ForwardDiff.jl). I would like to find the root f(x) = 0. …

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## [Where to put zlib1.dll to run Julia package](https://discourse.julialang.org/t/where-to-put-zlib1-dll-to-run-julia-package/133557)

<div class="topic-metadata">

**Author:** [@Monicate](https://discourse.julialang.org/u/Monicate)\
**Replies:** 0\
**Last updated:** [October 30, 2025, 1:32pm UTC](https://discourse.julialang.org/t/where-to-put-zlib1-dll-to-run-julia-package/133557 "2025-10-30T13:32:45Z")

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Hello, I’m trying to run a package ( Denice\_van\_Herwerden / jhrmstoolbox.jl — Bitbucket) and it complains about not being able to find zlib1.dll. Where do I need to put this file? I found a similar question for Linux bu…

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## [CSV.jl "corrupts" data when a field is very large](https://discourse.julialang.org/t/csv-jl-corrupts-data-when-a-field-is-very-large/133513)

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**Author:** [@sylvaticus](https://discourse.julialang.org/u/sylvaticus)\
**Replies:** 6\
**Last updated:** [October 30, 2025, 1:06pm UTC](https://discourse.julialang.org/t/csv-jl-corrupts-data-when-a-field-is-very-large/133513 "2025-10-30T13:06:08Z")

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I have a CSV (from here) where one field is a MULTIPOLYGON that can be very large, and when I import it with CSV (even a smaller 10 rows version) I got a strange corruption: julia\> data = CSV.read("MYRIAD-HES/test.cs…

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## [Is this conversion+store safe?](https://discourse.julialang.org/t/is-this-conversion-store-safe/133533)

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**Author:** [@Tortar](https://discourse.julialang.org/u/Tortar)\
**Replies:** 4\
**Last updated:** [October 30, 2025, 12:52pm UTC](https://discourse.julialang.org/t/is-this-conversion-store-safe/133533 "2025-10-30T12:52:11Z")

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I’m wondering if this is a correct usage of these unsafe functions: julia\> using StaticArrays julia\> a = MVector{4,UInt}(1,2,3,4); julia\> b = UInt.((5,6,7,8)); julia\> function f(a, b) dst = Base.unsafe\_con…

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## [Memory issues for long SSA simulations with mass action jumps](https://discourse.julialang.org/t/memory-issues-for-long-ssa-simulations-with-mass-action-jumps/133530)

<div class="topic-metadata">

**Author:** [@jworsfold](https://discourse.julialang.org/u/jworsfold)\
**Replies:** 1\
**Last updated:** [October 30, 2025, 10:53am UTC](https://discourse.julialang.org/t/memory-issues-for-long-ssa-simulations-with-mass-action-jumps/133530 "2025-10-30T10:53:39Z")

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I’m trying to find the stationary distribution of a Master Equation where the state space is bounded but can be too large to solve using FiniteStateProjection.jl so I’m left with running Gillespie simulations. Running l…

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## [Batched Matrix Multiply](https://discourse.julialang.org/t/batched-matrix-multiply/42332)

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**Author:** [@bmit](https://discourse.julialang.org/u/bmit)\
**Replies:** 12\
**Last updated:** [October 30, 2025, 8:22am UTC](https://discourse.julialang.org/t/batched-matrix-multiply/42332 "2025-10-30T08:22:15Z")

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I’d like to be able to be able to broadcast matrix multiplication across multidimensional arrays similar to the following: a = rand(4,3,2) b = rand(3,4,2) a .\* b # expect a (4,4,2) array, but instead errors I underst…

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## [Bug in interactive slider example in WGLMakie docs?](https://discourse.julialang.org/t/bug-in-interactive-slider-example-in-wglmakie-docs/133535)

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**Author:** [@IvanSpirandelli](https://discourse.julialang.org/u/IvanSpirandelli)\
**Replies:** 0\
**Last updated:** [October 30, 2025, 7:37am UTC](https://discourse.julialang.org/t/bug-in-interactive-slider-example-in-wglmakie-docs/133535 "2025-10-30T07:37:24Z")

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The following code snippet combines the sections for “Record a state map” and “Export” to create an interactive plot on an html-page. The problem is that the slider starts at 0 and never returns. It seems to jump up to 2…

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## [Error: I am trying to use MPSDynamics (in Julia 1.12.1), but got an error](https://discourse.julialang.org/t/error-i-am-trying-to-use-mpsdynamics-in-julia-1-12-1-but-got-an-error/133532)

<div class="topic-metadata">

**Author:** [@Anil\_Kumar](https://discourse.julialang.org/u/Anil_Kumar)\
**Replies:** 1\
**Last updated:** [October 30, 2025, 2:55am UTC](https://discourse.julialang.org/t/error-i-am-trying-to-use-mpsdynamics-in-julia-1-12-1-but-got-an-error/133532 "2025-10-30T02:55:08Z")

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I didn’t use Julia for quite a long time. But I usually work in Python (qutip, etc). Here is the error I got during the installation of MPSDynamics. (@v1.12) pkg\> add MPSDynamics Resolving package versions… ERROR: Uns…

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## [Issue: Enzyme + Flux double differentiation on custom layer](https://discourse.julialang.org/t/issue-enzyme-flux-double-differentiation-on-custom-layer/133503)

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**Author:** [@Gianmarco](https://discourse.julialang.org/u/Gianmarco)\
**Replies:** 3\
**Last updated:** [October 30, 2025, 1:52am UTC](https://discourse.julialang.org/t/issue-enzyme-flux-double-differentiation-on-custom-layer/133503 "2025-10-30T01:52:28Z")

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Hi, I’m using Flux and Enzyme for a project, and the entire architecture is built on top of these two libraries. So unless strictly necessary, I’d like to stay within the Flux/Enzyme ecosystem. For both libraries i’m u…

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## [Area interpolation between Shapefile (country borders) and WKT (multi)polygon elements in a CSV file](https://discourse.julialang.org/t/area-interpolation-between-shapefile-country-borders-and-wkt-multi-polygon-elements-in-a-csv-file/133458)

<div class="topic-metadata">

**Author:** [@sylvaticus](https://discourse.julialang.org/u/sylvaticus)\
**Replies:** 15\
**Last updated:** [October 30, 2025, 1:01am UTC](https://discourse.julialang.org/t/area-interpolation-between-shapefile-country-borders-and-wkt-multi-polygon-elements-in-a-csv-file/133458 "2025-10-30T01:01:00Z")

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I have a shapefile of administrative country borders and a CSV file where one field is “geometry” and embed polygon and multipolygon data as "Well Known Text (WKT). Both are in EPSG:4326. How can I retrieve for each ele…

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## [This month in Julia world - 2025-09](https://discourse.julialang.org/t/this-month-in-julia-world-2025-09/133110)

<div class="topic-metadata">

**Author:** [@Krastanov](https://discourse.julialang.org/u/Krastanov)\
**Replies:** 4\
**Last updated:** [October 29, 2025, 10:11pm UTC](https://discourse.julialang.org/t/this-month-in-julia-world-2025-09/133110 "2025-10-29T22:11:23Z")

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A monthly newsletter, mostly on julia internals, digestible for casual observers. A biased, incomplete, editorialized list of what a clique of us found interesting this month, with contributions from the community. For …

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## [New "easy rule" system for Enzyme](https://discourse.julialang.org/t/new-easy-rule-system-for-enzyme/133522)

<div class="topic-metadata">

**Author:** [@gdalle](https://discourse.julialang.org/u/gdalle)\
**Replies:** 4\
**Last updated:** [October 29, 2025, 9:27pm UTC](https://discourse.julialang.org/t/new-easy-rule-system-for-enzyme/133522 "2025-10-29T21:27:57Z")

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Hi there @wsmoses and friends, Thanks for the new easy rule system! Making rules more accessible is a great idea to get more people into autodiff (that’s how I got hooked in the first place). I’m curious to understand …

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## [How to avoid recompilation when a large Julia function is called with many different argument combinations](https://discourse.julialang.org/t/how-to-avoid-recompilation-when-a-large-julia-function-is-called-with-many-different-argument-combinations/133516)

<div class="topic-metadata">

**Author:** [@r2ached](https://discourse.julialang.org/u/r2ached)\
**Replies:** 3\
**Last updated:** [October 29, 2025, 8:25pm UTC](https://discourse.julialang.org/t/how-to-avoid-recompilation-when-a-large-julia-function-is-called-with-many-different-argument-combinations/133516 "2025-10-29T20:25:37Z")

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Hi everyone, I’m working on a Julia application where one top-level function has an input called configuration. This function gets called many times with different configurations. The problem I’m having is that Julia r…

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## [Is this pattern still thread safe in Julia 1.12?](https://discourse.julialang.org/t/is-this-pattern-still-thread-safe-in-julia-1-12/133484)

<div class="topic-metadata">

**Author:** [@sylvaticus](https://discourse.julialang.org/u/sylvaticus)\
**Replies:** 14\
**Last updated:** [October 29, 2025, 7:25pm UTC](https://discourse.julialang.org/t/is-this-pattern-still-thread-safe-in-julia-1-12/133484 "2025-10-29T19:25:43Z")

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I adopt this pattern (1) to allow non default random threads that may be not thread safe themselves and (2) to obtain the same result whatever the number of threads used: import StableRNGs, Random function goo(outseed)…

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## [Downloads.download or run(\`wget\`) much slower than direct \`wget\`](https://discourse.julialang.org/t/downloads-download-or-run-wget-much-slower-than-direct-wget/133501)

<div class="topic-metadata">

**Author:** [@sylvaticus](https://discourse.julialang.org/u/sylvaticus)\
**Replies:** 2\
**Last updated:** [October 29, 2025, 4:31pm UTC](https://discourse.julialang.org/t/downloads-download-or-run-wget-much-slower-than-direct-wget/133501 "2025-10-29T16:31:47Z")

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I am trying to download a relativelly large dataset from Zenodo (6GB), and if I use Downloads.download or run(wget) in a Julia v1.12 session, it takes 2h, while if I directly use wget in a console it takes 16 minutes. I…

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