Questions tagged [bugs]

This tag is reserved for questions where the problem has been vetted by this community and the observed behavior is confirmed to be a bug. Please do not use this tag for new questions. Please use the standard bugs header instead of version tags in conjunction with this tag.

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4
votes
1answer
104 views

Issue with PlotRange and Graphics3D in version 12.2

When Boxed is set to False, PlotRange no longer works. I feel this should be considered a ...
10
votes
1answer
293 views

Graphics not correctly produced when saving to PDF in Version 12

12.0.0 for Microsoft Windows (64-bit) (April 6, 2019) How do I get my graphic to look the same in PDF as it does in a Notebook? This is what the graphic looks like in the FrontEnd: This is how the ...
9
votes
1answer
142 views

MoleculePlot draws sucrose benzoate with overlapping bonds

Recently I learned that in Mathematica it is possible to create chemical structures here: Chemical formulas with Mathematica I am having a problem with a structure called "Sucrose benzoate" (...
6
votes
0answers
99 views

Sum cause a Recursion problem

Sum[((-1)^(i + 1)*Binomial[n, i]*(n - i)!)/n!, {i, 1, n}] This cause a Recursion problem. As the comment said, If simplify the formula and then sum it, problem ...
1
vote
3answers
128 views

Mathematica has detected an internal error

When trying to plot the following function in version 12.2 f[x_]:=x Exp[-x^2] F[y_]:=NIntegrate[Sign[f[x]]Sqrt[((f[x])^2)/(f[x]+1)],{x,0,y}]; Plot[F[x],{x,-5,5}] ...
20
votes
1answer
766 views

These PDE's no longer evaluate in version 12.2 as they did under 12.1. What can be done to make them evaluate under 12.2?

These 399 PDE's no longer produce result under Version 12.2 on windows. DSolve now returns unevaluated. These all evaluated under version 12.1. Why is that? And ...
5
votes
0answers
72 views

Exported arrow to PDF or EPS messes up its tip [duplicate]

The code g = Graphics[{AbsoluteThickness[20], Arrowheads[0.5], Arrow[{{0, 0}, {1, 1}}]}, PlotRange -> {{0, 1.1}, {0, 1.1}}] Export["Arrow.eps", g]; ...
4
votes
1answer
76 views

Transpose::nmtx error when using Greek Formal symbol in NDSolveValue

Bug introduced in 12.0 or earlier, persisting through 12.2. Consider the following call to NDSolveValue for a system of ODEs with 2 dependent variables, where we ...
6
votes
1answer
147 views

Workaround for a breaking change in ConnectedMoleculeComponents from 12.1.1 to 12.2.0

The following code used to work in Mathematica Version 12.1.1: ...
0
votes
0answers
23 views

Null using PlotMarkers in QuantilePlot [duplicate]

I suspect a bug using PlotMarkers and QuantilePlot. Seems related to the unity line, see figure below. ...
8
votes
2answers
355 views

Cannot reproduce well-known summation result

Bug introduced in 4.2 or 5.0, persisting through 12.2.0. Note: this is a repost of my OP on math.SE. I am posting it here because multiple users with different Mathematica versions have given me the ...
7
votes
1answer
139 views

Solve`DirInf[] — Meaningful value or just a bug?

Bug introduced in 4.1 or earlier and persisting through 12.2.0. or later To the problem below, I get four independent, incomplete solutions, three in terms of ...
4
votes
0answers
83 views

Is this a bug of BoundingRegion of MinBall

...
5
votes
0answers
161 views

Incorrect result by DSolve

For real $x$ consider the trivial equation $$|y'(x)|=-|x|.$$ Since the left side is always positive and the right always negative, there is no solution. Let's try ...
0
votes
1answer
82 views

$\sum_{n=1}^{+\infty}\frac{\cos(\frac{n\pi}{2})}{n}$ gives wrong answer in Mathematica? [closed]

I wanted to compute $\sum_{n=1}^{+\infty}\frac{\cos(\frac{n\pi}{2})}{n}$ on Mathematica and it says the sum does not converge, even though it does by Dirichlet's test. When I plugged the same sum in ...
0
votes
1answer
65 views

Wrong result with symbolic calculation in Mathematica

I am looking at the expansion of a time series Series [$\left(\sum_{s=1}^\infty\frac{r}{(1+k)^s}x^{s+1}\right)^{-1}${x, 0, 2} ...
7
votes
1answer
315 views

Why does `Molecule` return a molecule for an incorrect SMILES string?

When I type an incorrect SMILES into the Molecule function, the output a large, unrelated molecule. What is Molecule doing here, and is it possible for the command ...
6
votes
1answer
70 views

NearestNeighborGraph doesn't show a 3D graph when one or more points are Integer and the rest are Decimal?

Bug introduced in 10.3 or earlier and persisting through 12.1.1 When all the points are the same kind, say Integer then ...
1
vote
0answers
20 views

“NDSolve::femper” Error in Solving Coupled Nonlinear PDEs [duplicate]

Bug introduced in 12.0.0 - Fixed in Version: 12.2.0 For example, consider the following piar of PDEs with two unknown functions $u(x,y)$ and $v(x,y)$: $$ \partial_x^2 u+\partial_y\left(v\partial_y u\...
4
votes
0answers
82 views

minimum bounding ellipsoid example does not work in 12.1.1.0

I am surprised that WRI never checks previous examples before shipping new versions. The following example is mentioned and highlighted on the webpage. It does not work in 12.1.1.0 and as far as I ...
7
votes
1answer
135 views

How to remove Null plot markers in QuantilePlot?

Bug introduced in 12.0 and persisting in 12.1.1 I want to change the plot markers of the data points in QuantilePlot. This seems pretty straightforward: ...
14
votes
1answer
182 views

Why does Abs return negative values?

According to the documentation Abs[z] gives the absolute value of the real or complex number z and is also known as the modulus. As far as I'm aware for any definition of the absolute value, norm or ...
4
votes
1answer
112 views

Integration of product of BesselJ and BesselY not giving correct results

I am trying to integrate a product of Bessel functions as shown below. Where z is real valued and positive. The integration yields MeijerG functions. Taking a ratio of the derivative of the MeijerG ...
2
votes
1answer
66 views

FindGeometricTransform not working properly for a simple problem

I am surprised why FindGeometricTransform is failing to automatically register or align two sets of points that are drawn from a ...
8
votes
0answers
122 views

Has the Undo command really been settled? On version 12.1 it only works sporadically. What are some reasons it drops steps?

Although Undo has been around since version 10 (before my time) I've noticed that sometimes it works just fine up to the moment of the last ...
0
votes
0answers
41 views

Can't save notebook. Save Dialogue opens “Stylesheet Dialogue” instead

I tried both CTRL+S as well as File->Save. But this both produces the dialogue shown below. Save As opens a new empty notebook. Why does this happen and how do I fix it?
2
votes
1answer
129 views

Bug in DSolve when solving a system of two second order PDEs?

I'm solving a simple system of PDEs in Mathematica 11.1: DSolve[{D[f[x, y], x, y] == 0, D[g[x, y], x, y] == 0}, {f[x, y], g[x, y]}, {x, y}] This gives: ...
4
votes
1answer
135 views

Why is Integrate[Exp[-x^2/s^2],{x,-Infinity,Infinity}] not the same as -Integrate[Exp[-x^2/s^2],{x,Infinity,-Infinity}]]

Version 12.1 Clear[s] Integrate[Exp[-x^2/s^2],{x,-Infinity,Infinity}] generates the correct conditions. But, ...
1
vote
0answers
43 views

Reducing generalized eigenvalue problem to regular eigenvalue problem

I expected generalized eigenvalue problem on $(A, B)$ to reduce to eigenvalue problem on $B^{-1} A$ when $A$, $B$ are full rank (Section 7.1 of generalized eigenvalue tutorial), but I get different ...
7
votes
4answers
310 views

Why do isolated large values of WorkingPrecision fail in NDSolve?

Executive Summary: Getting an accurate answer often depends on setting the WorkingPrecision high enough. Once it is high enough, though, I would expect that its ...
8
votes
2answers
198 views

Nonlinear diffusion equation: Periodic boundary conditions not satisfied (BUG?)

it's me again. Strange stuff to report today. I suspect I've found a bug! Here is the nonlinear diffusion equation direct from the Mathematica documentation for FEM. ...
4
votes
1answer
127 views

PeriodicBoundaryConditions: missing points (a simpler example)

EDIT: I reported this to Mathematica support. Will update later. I just posted on this issue, but I found a more elementary example which I think will make the issue more transparent. Apparently, ...
1
vote
1answer
41 views

How do I get `ArrayMesh` to reverse the order of data in a 3D array?

The following array has non-zero entries in the cells where all three indices are equal: foo = SparseArray[{i_, i_, i_} -> 1, {4, 4, 4}] When I try to render ...
8
votes
1answer
108 views

DSolve leaks internal error messages when attempting to solve two first order autonomous ODEs

Issue reported to Wolfram, Inc as a possible bug in Version 12.1.1; CASE:4630268. With Mathematica "12.1.1 for Microsoft Windows (64-bit) (June 19, 2020)", ...
2
votes
1answer
46 views

EntityValue timeout

Bug in 12.1.1 and possibly earlier versions Acknowledged by WRI as an issue CASE:4617646. ...
4
votes
1answer
41 views

Problem exporting a plot with an inset plot (weird resizing)

I'm having issues in saving out a plot with another plot inset within it. Here is a basic example. theInsetPlot = Plot[Sin[x], {x, 0, 6 Pi}]; ...
4
votes
1answer
87 views

ContourPlot3D in a Cube region creates just an opaque cube

I tried the following code ContourPlot3D[x^2 + y^2 + z^2 == 1, {x, y, z} \[Element] Cube[2], RegionBoundaryStyle -> None] And I got only this opaque cube. So I ...
3
votes
0answers
85 views

ParametricNDSolveValue causes kernel to crash

In the course of answering question 228693, I found that ...
2
votes
1answer
50 views

Inconsistent behavior of Limit function when evaluating a directed limit at a discontinuity

Consider the following expression: (* In *) expr1 = Hold[Limit[Sign[x], x -> y, Direction -> "FromAbove"] == Sign[y]] Now let's substitute a ...
8
votes
2answers
194 views

Parsing error [bug?] with systems of nonlinear PDEs, Mathematica 12.0.0

Bug introduced in 12.0 and persisting through 12.1.1 - Fixed in Version: 12.2 I find the following behavior using 12.0.0. (EDIT: I asked a friend to try it in 12.1.1 and he finds the same result.) ...
10
votes
3answers
388 views

The numerics of FresnelS[]

Bug introduced in 12.1 or earlier and persisting through 12.1.1 or later [CASE:4615361] Note: A worse problem existed in 12.0 for inputs greater than 8 and of ...
0
votes
1answer
94 views

Is financial visualization broken? Can you run any of these examples or InteractiveTradingChart[] at all?

I can't run anything relevant to financial visualization in my mathematica installation, i found these interesting example but anything that use the trading chart is kind of broken. EDIT: I'll add a ...
0
votes
0answers
36 views

Mathematica fails to load welcome screen: “Authentication Required”

Problem When I open Mathematica 12.1.0 on windows 10, I get an "Authentication Required" window during the splash screen. The auth window has no input or buttons, and the text in the window ...
14
votes
4answers
726 views

FEM: Why are the numerical solutions of field equations with D and Inactive[Div] and Inactive[Grad] different?

Bug introduced in 12.1.1 or earlier - Fixed in Version: 12.2.0 Suppose you have the DE $$ \frac{d}{dx} \left( c(x) \left[\frac{d}{dx}u(x)\right] \right) + n(x) = 0 $$ and you want to solve for $u(x)$ ...
2
votes
0answers
46 views

`SumConvergence` gives different results for two equivalent series

Bug persisting through v12.0.0.0 and resolved in v12.1.0.0 Consider these two sequences: a = 2^n/(n! Gamma[(1 - n)/2]^2); b = Simplify[a /. n -> 2 m] It turns ...
3
votes
2answers
118 views

How to display full 3D region?

Answers to an earlier posting, ConvexHullMesh inconsistency, have let me construct a particular 3D region by intersecting a pyramid with a halfspace: ...
5
votes
1answer
110 views

ConvexHullMesh inconsistency

I am seeing an inconsistency in ConvexHullMesh that I don't understand. Here is Rhull = ConvexHullMesh[pts8] where the $8$ ...
4
votes
1answer
97 views

Strange behaviour in ToElementMesh

Why would that not work: ...
9
votes
2answers
168 views

Problem with Binomial numerical computation

Using Mathematica 10.4.1.0 I have a problem with Binomial on numerical computations. Both of the following correctly return 1.0 as the result: ...
9
votes
1answer
140 views

Peculiar behaviour in the implementation of “Filling”

I was working with mathematica and I need to use "Filling", however I notice that it doesn't work when you have "small" numbers, for example if I make the following: ...

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