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Simulating an empty system leads to an error, so one has to do something like
```julia
julia> sys = structural_simplify(mediumModel)
Model mediumModel with 0 equations
States (0):
Parameters (0):…
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As in the title, I'm faced with a problem implementing flux limiters in MethodOfLines where I need to apply a callback `step_limiter!(uarr, integrator, p, t)` to handle situations where the timestep `…
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This is related to #2339. If I run the following MWE:
```julia
using ModelingToolkit
using DifferentialEquations
using Plots
using Unitful
@variables t x(t)
D = Differential(t)
@mtkmode…
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The problem occurs when connect something to a basic 'connector'.
The code comes from @[YingboMa](https://github.com/YingboMa)'s code in #1544
I add variable `P(t)` to `Pin` for test. `P(t)` is mark…
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**Describe the bug 🐞**
When running a differential equation system using ModelingToolkit, an internal error occurs where variables (N(t))[1] and (N(t))[2] are unexpectedly marked as zero in the equat…
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As originally discussed in #12279, depending on the specific application, there could be different requirements for Base Modelica output. At one end of the spectrum, if Base Modelica output is fed int…
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**Defect description** : confusing '?'s
**Steps to reproduce the issue :**
1)open vlabs using the link vlab.co.in
2)choose the participating institute as iiith and basic structural analysis lab.
…
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I was building the basic spring-damper system as
```
using ModelingToolkit, ModelingToolkitStandardLibrary, DifferentialEquations
using ModelingToolkitStandardLibrary.Mechanical.Translational
…
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Hi all, I am totally new to the openmodelica and this powerSystem lib. When I tries to run the DFIG example, I have error as:
%%---------------------------------------------
[4] 14:55:35 Transla…
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Hi,
I am trying to solve this PDE system and getting the error below. Any ideas what I am missing here?!
Thank you.
Modeling code:
```
using DifferentialEquations, ModelingToolkit, Method…