Questions tagged [warning-messages]

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2
votes
3answers
114 views

Normalizing singularities in NDSolve

I've tried to create the following example. Suppose that I have the differential equation: $$ U''(x) = \frac{U'(x) - U(x)}{x}, $$ which I know 1 boundary condition and know that this function should ...
5
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2answers
153 views

"Ambiguity, should literally match independent variables" in NDSolve with shooting method

there. I am trying to solve a seccond order equation, with 1 boundary condition at the start of the range and another at the end of the range. I've attempted to reduce my problem so that it is non-...
0
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0answers
33 views

Evaluate, NDSolve and ReplaceAll do not work with tables of solutions

Why does the following report an error even though it returns a (seemingly valid) result? It's also weird that it returns a list of lists, whereas I would expect just a list. ...
2
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1answer
175 views

Optimization for numerical integration of Airy function and using NIntegrate inside NDSolve

Sorry for the long post. I need to integrate a function which uses the trajectory data given by the Lorentz force equation. We have the electromagnetic field: $$ \vec{E}=E_0 \cos{\omega(t+\bar{z})}\...
2
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0answers
36 views

How to catch this error from TeXForm? TeXForm::unspt

I get lots of error from using TeXForm in 12.3.1 on some solutions that contain DifferentialRoot written in the new ...
3
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1answer
180 views

Why can I not numerically integrate a smooth, integrable function?

Consider the function $cosec(t)sin(3t)$ on the interval $[0,\pi]$. This is a perfectly well-behaved smooth function, as can be seen when plotting it: ...
0
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1answer
37 views

Difficult on integration the normalization of a piecewise function

I have a little problem; I have defined the following Piecewise-function in the variables {x,L,w}: f[x_, L_, w_] := Piecewise[{{x w (L - x), 0 <= x <= L}}]; ...
1
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0answers
44 views

Are these solutions correct using `AsymptoticDSolveValue`? Less::nord: Invalid comparison with I attempted

Should one worry about correctness of these solutions due to the messages they generate? Or can one safely ignore these messages? Example 1 ...
0
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1answer
130 views

How do I avoid the singularities during the calculation of an integral?

I face a serious problem when I try to calculate the following integral. My code is the following: ...
0
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1answer
57 views

NBodySimulation softening parameter

I'm simulating the orbit of a binary black hole immersed in some halo of particles and the simulation does not want to continue on for the specified amount of time. It always halts at a seemingly ...
4
votes
1answer
118 views

How do I get rid of the message: "Inverse functions are being used by Solve, ...; use Reduce for complete solution information." [closed]

OK. I get it. I understand the difference. How do I permanently suppress this message?
0
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0answers
21 views

NDSolve SetDelayed error

I'm trying to calculate the first derivative of a function at a number of points using the 4-th order finite difference matrix, and then multiplying it with the function values at that point. I wrote ...
1
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0answers
26 views

Error when exporting

Imagine I have a list of plots, call it frames, and I rasterize them in order to have a smoother exported video, like so ...
2
votes
2answers
79 views

Calculation of composite integrals

I am facing trouble calulating the following integrals. Could you give me any advice? My code is the following: ...
1
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1answer
59 views

Is there a comprehensive list of most common or most important native Message-s (w/tags) for errors and Failed?

Yes I understand how to use Messages[symbol] but that doesn't help much. I have no idea which important ones I may have missed in my search or even how many exist. ...
3
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0answers
87 views

What do “Analyze Notebook" and "Analyze Cells" Do?

What does "Analyze Notebook" and "Analyze Cells" do? They seem to, at least, point out some coding errors that are already highlighted in a notebook. Do they do anything else? Is ...
2
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1answer
48 views

Why is Style ignored in my custom Echo error function?

To highlight the type of error that occurred the function echoError (via err) should display type of error in color: ...
0
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0answers
49 views

Conditional Statement and Loop in Mathematica to find bound

I have a question regarding loop and conditional statements. I have an equation where I would like to find the bound for n and m based on the value of h. Here is what I have so far; ...
0
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0answers
56 views

CUDAFunction Complie Error under Linux: Attribute "__malloc__" does not take arguments

I'm currently using version 12.3.1 under Ubuntu 20.10, with the newest graphics driver(495) and CUDA 11.5. Mathematica can detect and run some CUDA operations except CUDAFunction*. I can't run any ...
0
votes
1answer
55 views

Creating a ListPlot From Imported Excel file with errors

I'm learning mathematica, and right now trying to plot a graph with error bars. What I would like to do is to import 3 lists with x values(1/viscosity), y values(permeance), and error values, and plot ...
-1
votes
3answers
68 views

How to solve this error message?"is too small to represent as a normalized machine number; precision \ may be lost."

How to solve this error message? I don't know how to set precision. if I in this case would not have this error k10 = {}; Do[If[Positive[Det[Table[(-0.15 + x1.49910^(-6))^(i + j), {i, 1, 9}, {j, 1, 9}]...
4
votes
1answer
84 views

ReImPlot does not plot Imaginary part in Wolfram Cloud

Recently came across a problem: when trying to plot complex-valued function with ReImPlot in WolframCloud (free version), i get only a real part. Is this a free-version issue or something else?
1
vote
1answer
135 views

There are some warnings thrown with NDSolve here. How can I change my code to avoid them?

I want to solve some differential equations, but the warnings "NDSolve change the value" are thrown. How do I change the equations? Are there some equations that are not allowed? Are some ...
0
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0answers
22 views

Messages no longer appearing beneath code [duplicate]

At some point after I updated to 12.3.1 I started noticing that messages stopped appearing beneath the code. So for example, I used to be able to do 1/0 and I'd see ...
0
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1answer
32 views

Suppress "integral does not converge" error message

Is there a way to suppress this error message and beep?
7
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1answer
101 views

Compile Can Handle Passing an Empty List Only When Returned by Some Functions?

There seems to be a bug whereby Compile can deal with empty lists only when passed in some cases. Consider the case below. ...
1
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0answers
68 views

NIntegrate and MaxRecursion

I'm using NIntegrate to get the value of a very complicated function f[k,T,M], where T and <...
0
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0answers
85 views

Part specification is longer than the depth of object

I want to solve the function lns50 all the values are Part 1 of an List ...
1
vote
1answer
83 views

Non-numerical values for integral

I am trying to solve the following integral numerically ...
2
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0answers
40 views

JordanDecomposition not evaluating

When there are very small differences between entries in a diagonal matrix, sometimes JordanDecomposition does not evaluate and gives an error message: ...
10
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1answer
263 views

"instruction 9223372036854775807" Bug and Bug with Using DeleteCases[] inside Compile[]

I get an error referring to "instruction 9223372036854775807" as follows. I run the code ...
1
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0answers
44 views

What do do if Mathematica stops without error messages?

I am trying to run the relatively simple code ...
0
votes
1answer
61 views

Mysterious RegionDistanceFunction::regp message

Bug introduced in 12.3.1 or earlier [CASE:4853257] I encountered a strange problem with RegionDistanceFunction. Consider this list of points (I'm forced to use <...
0
votes
2answers
88 views

Mixed Integer and real domain for variables

Does Mathematica support in Maximize function to put some variables belong to Integers and others to Reals I tried that but I have an error that this not implemented yet is there any way to do that ...
1
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0answers
54 views

logit ScalingFunctions

Having learned how to make symlog axes in this question, I was interested in the logit scale, the transforms of which are ...
1
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0answers
50 views

NDSolveValue BVP that encounters infinity

Problem setup: I'm trying to solve the following, quite hairy, first order BVP problem, with four unknown functions $\phi, \theta, p_\phi, p_\theta$, and boundary conditions at $\phi(0), \phi(1), \...
1
vote
1answer
88 views

how can i solve a system with inexact coefficients

I try to solve this system: e1 = H1[0, y] - H1[0, Y] e2 = H2[0, y] - H2[0, Y] with ...
2
votes
0answers
23 views

[NDSolve error]: Equation or list of equations expected instead of 0.0001` in the first argument {(s^\[Prime])[t]==-0.325 s[t]-1.5 i[t] s[t]-1.5 [closed]

I am trying to have 5 PDEs with 5 unknowns, with code below However, I always receive the error message that Equation or list of equations expected instead of 0.0001` in the first argument {(s^[Prime])...
0
votes
0answers
48 views

parallelization works only with one kernel

I am using MMA 12.3.1 on Ubuntu 18.04, and my license support parallelization. The default kernel is Local and I create another one named newKernel. when I launch MMA and choose Local to perform some ...
2
votes
0answers
68 views

NSum complaining of being non-numerical

I am trying to evaluate the sum $\sum_{k,l=1}^{30}\frac{1}{(k^2+l^2+1)^{5/4}}$ so I write NSum[1/(1 + k^2 + l^2)^(5/4), {k, 1, 30}, {l, 1, 30}] but I get a message ...
2
votes
0answers
44 views

How to remove "Qt issued a fatal error: QXcbConnection: Could not connect to display"?

I'm using Mathematica 11.2 on Linux. At the end of my script, I'm adding an Export command to export my results into a pdf file. I'm receiving the error msg: Qt ...
0
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0answers
49 views
1
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0answers
121 views

NDSolve Error test failure at t == 5082.429032772312`; unable to continue

I am quite new to Mathematica, please help me struggling out of this question. I want to know how the HNO3 and HNO2 change in the system. first, I put the kinetics of some reactions: ...
4
votes
0answers
94 views

How to use NDEigenvalue to accurately estimate functional determinants?

Goal: Ultimately, I would like to find a trustworthy approximation for the ratio of the functional determinant of two differential operators using the formula $$ \frac{\text{Det}[\hat{D}_0]}{\text{Det}...
0
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0answers
33 views
0
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1answer
40 views

Differentiation inside recursive expression is not compatible with Manipulate [duplicate]

Define a sequence of function recursively: f[n_, x_] := D[Exp[x] f[n - 1, x], x] f[0, x_] = 1 Then, the following Manipulate ...
5
votes
2answers
182 views

Error message shows up when I start working on a previously saved notebook on Mathematica

I am new to Mathematica and hope this is not something very obvious. Whenever I start a new session on Mathematica and try to work on a previously saved file, Mathematica shows me the error message I ...
1
vote
1answer
72 views

How to force Mathematica throwing an error box intentionally?

When building a Module function, I try to throw an error box when this function facing some cases. But I don't know how to output this error box with ground methods. This picture is the Mma error bar ...

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