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.

Filter by
Sorted by
Tagged with
3
votes
1answer
124 views

Solve returns solution that isn't (always) one

I was asking Mathematica to find the roots of $f(x) = a+\sqrt{x^2-b}$ and it returns $x = \pm \sqrt{a^2+b}$. These are however solutions only if $a\leq 0$ (there are no roots if a is positive since ...
11
votes
3answers
302 views

Simplifying Cosh[a] + Sin[a] + Sinh[a]

Why does FullSimplify[Cosh[a] + Sinh[a] + Sin[a]] not return Exp[a]+Sin[a] ? Is this some bug in Mathematica or am I being ...
12
votes
1answer
327 views

Symbolic integration of potential over a disc : branch cut problem?

Context I am trying to explore the geometry of a crystal made of irregular bubbles. See animation here. very vaguely in the spirit of this post (it is in fact motivated by cosmology and galaxy ...
1
vote
1answer
86 views

Problem of result of TopProbabilities in NetModel

Bug introduced in 11.3 and fixed in 12.0.0 I'm on Mathematica 11.3, Classify model could use TopProbabilities without designating an integer. ...
33
votes
1answer
1k views

Complex eigenvalues from a sparse Hermitian matrix

Bug introduced in 9.0 or earlier and persisting through 12.0. I notice in the following example that wrong complex eigenvalues are resulted if calculating from a Hermitian sparse matrix, which should ...
6
votes
3answers
129 views

Sometimes Region can't build right region

During my work with NDSolveFEM I found strange behavior of function Region. ...
5
votes
0answers
128 views

Integrate under assumptions

I am trying to solve the following integral: $$\int_0^\infty u^{\sigma-1} \exp\left[-c u^\sigma\right] \mathrm{d}u$$ under the assumptions $\sigma \in (0,1)$ and $c>0$. I know the result is $$\...
10
votes
1answer
106 views

Parallelize[MapIndexed[…,Association[…]]] returns broken result

Bug introduced in 10.0.2 or earlier and persisting through 12.0 Confirmed: CASE:4041910 Consider the following example: ...
6
votes
1answer
74 views

Automatic PlotRange based on Interpolation results

Persisting through 11.3, fixed in Mathematica 12.0 We generally use PlotRange->All to see all available points in a plot. But how do you use ...
10
votes
1answer
146 views

Wha't the meaning of NaN in the descriptor of ImageKeypoints

Bug introduced in 10.3 or earlier and persisting through 11.3 ...
10
votes
1answer
99 views

SystemOpen from ScheduledTask

I could bet it used to work, now the following code fails 95% of times: RunScheduledTask[Echo @ SystemOpen @ "https://www.wolfram.com", {1}] Can you reproduce ...
8
votes
1answer
193 views

11.3 - import of files with paths containing non-ASCII characters [duplicate]

Import: Version 11.2 works correctly, no problem with non-ASCII characters in the path of file. But upgrated version 11.3 a) does not import these files b) ...
6
votes
2answers
104 views

GraphDistance error when Graph vertices are Associations

Bug introduced in 10.0 or earlier and fixed in 12.0 Note: Associations are new in 10.0 Here is a nice graph whose vertices are Associations: ...
12
votes
5answers
980 views

PDF Export in 11.3

I have some Mathematica notebooks that have text, code, plots, and hyperlinks in some text cells. The notebooks use a custom stylesheet that I've used for a number of years. Up until version 11.3 ...
3
votes
2answers
121 views

Inconsistencies when using BodePlot with `StateSpaceModel` and `TransferFunctionModel`

Consider a linear system . ...
22
votes
5answers
1k views

PDF export on macOS Mojave produces bold fonts

I have updated my OS to macOS 10.14 Mojave. I found whenever I export a plot into a PDF file, the font of the label and ticks are automatically replaced into a bold font. I use Mathematica 11.3. Any ...
8
votes
2answers
123 views

Kernel shut down when use FindFaces with LBP Cascades

I found Mathematica can use OpenCV to improve face recognition in FindFaces: how to improve the results of the face recognition feature. But I tried this way and the kernel crashed. ...
14
votes
4answers
396 views

Terrible accuracy of DawsonF

DawsonF[30.] returns 0. The correct value is 0.016676... At least it prints a warning message, ...
4
votes
0answers
115 views

DSolve, NDSolve with WhenEvent Give Incorrect Solution for Simple ODE

NDSolve Results On the course of addressing question 181974, I encountered the following problem. ...
11
votes
2answers
228 views

Bug in NearestNeighborGraph

Update Not fixed in 12.0. NearestNeighborGraph generates incorrectly formatted output on rasterized input. Reported to Wolfram support CASE:4093797 ...
11
votes
1answer
212 views

MousePosition in AttachedCell?

I can't figure out why the following stops working when "WindowAbsolute" is replaced with "Graphics"? ...
4
votes
0answers
89 views

Is there any place where all current Mathematica bugs are listed? [duplicate]

It will be nice to be aware of bugs that the current version of Mathematica has. Is there any place where all current Mathematica bugs are listed?
7
votes
2answers
114 views

What are these markers at the bottom of BarLegend?

Bug introduced in 11.3 and fixed in 12.0 I've noticed these small ruler-type markers at the bottom of BarLegend objects. ...
5
votes
0answers
193 views

Non-determinstic kernel crash when manipulating large expressions in Mathematica 11.3

I have a encountered a very weird behavior of Mathematica 11.3 when collecting and factoring large expressions. To be more precise, such operations often lead to an abrupt kernel crash, but the ...
6
votes
0answers
69 views

Why can't (partially) packed arrays be used in this example?

Bug introduced in 11.3 or earlier and persisting through 12.0 or later I didn't expect any difference between these: ...
3
votes
0answers
70 views

WSGetUTF8Function missing in WSTP DLL

Bug introduced in 10.0 and persisting through 11.3.0 Note: MLGetUTF8Function is new in 10.0 (ML interface 4). Despite being in docs and ...
3
votes
1answer
85 views

Benchmarking problem in V11.3 on Win7/10 X64 [closed]

I am the guy that likes to use BenchmarkReport[],see here for example. I noticed this loooong time ago after 11.3 was released, but never reported it. I wonder if ...
6
votes
0answers
192 views

DSolve Returns Incorrect Solutions for First-Order ODE

Bug introduced in 10.4 or earlier and persisting through 11.3. Reported to Wolfram Technical Support as CASE:4150361. Fifty-one DSolve questions on this site are ...
3
votes
1answer
46 views

TimeSeriesShift issue with TimeZone

I have to work with such a TimeZone to deal with daylight saving time. ...
14
votes
1answer
187 views

Exporting graph object for later use

Bug introduced in 10.0 or earlier and fixed in 12.0 We are planning to analyze the geometry of artery branch patterns. We convert the binarized image into graph object using ...
7
votes
1answer
619 views

What does the syntax C[1][x][y] mean?

I am examining an integrability condition, $$u_{3,122}=u_{3,123}.$$ Typing DSolve[D[u3[x1,x2,x3],x1,x2,x2]==D[u3[x1,x2,x3],x1,x2,x3],u3,{x1,x2,x3}] it into MMA ...
8
votes
2answers
282 views

Confused about the solution obtained from vector linearization

I am trying to linearize a vector expression $$\frac{(\mathbf{u}+d\mathbf{u})\times(\mathbf{v}+d\mathbf{v})}{\vert(\mathbf{u}+d\mathbf{u})\times(\mathbf{v}+d\mathbf{v})\vert}$$ Here is my code ...
10
votes
3answers
257 views

RegionMember[ ] in polygon

Bug introduced in 10.0 and fixed in 12.0. I am seeing a difference in RegionMember[ ] testing a point inside a 3-vertex polygon and testing a point inside a more ...
5
votes
1answer
258 views

3D arrow head not at the end of the shaft

Why when I use: Graphics3D[{Red, Arrowheads[0.1],Arrow[Tube[{{1, 1, -1}, {2, 2, 0}, {3, 3, -1}, {4, 4, 0}}, 0.05]]}] which I copied from the wolfram website the ...
6
votes
2answers
229 views

Unable to evaluate Eigenvalues and Eigenvectors for a matrix

I have the following 3X3 matrix M and I wish to find its eigenvectors and eigenvalues ...
4
votes
1answer
154 views

How to use Glow in ParametricPlot3D

I get the output that I need from ...
2
votes
1answer
93 views

When PlotRangePadding is provided with Scaled[] and the lower limit is non-negative, xmin for the tick mark function is wrong

For things like Plot, tick marks can be provided as a function (see Ticks), which will be given the values of the minimum and maximum ends of the respective axis or ...
6
votes
1answer
102 views

Bug in ListPlot: Duplicate markers (one list containing ``Infinity``)

simple plot of two lists, of which one contains infinity (markers are slightly shifted): ...
2
votes
1answer
142 views
3
votes
1answer
153 views

Log transformed histogram distribution

Bug introduced in 11.0.1 or earlier and persisting through 11.3.0 or later I try to get a Log transformed histogram data I get from a different program ...
2
votes
2answers
91 views

Incorrect result for the region of convergence of a simple integral

Bug persisting at least through version 11.3.0 The standard Gaussian integral Integrate[Exp[-a x^2], {x,-Infinity,Infinity}] returns ...
5
votes
0answers
88 views

Problems with Failure in Testing Notebooks

This always fails the test: Failure["General", <|"MessageTemplate" -> "`1`", "MessageParameters" -> {foo}|>] While this passes as expected: ...
9
votes
2answers
228 views

Issue with FrameTick marks in Mathematica 11.3

Bug introduced in 11.3 or earlier and fixed on 12.0. For a while I have been using the same code to make figures with tick marks pointing out from the axes away from the center of the figure. ...
4
votes
1answer
123 views

possible bug with Limit

Evaluate this limit analytically Limit[Sum[Sqrt[1 + i^2/n^2]/n, {i, n}], n -> Infinity] Mathematica 11.3 gives 0. But ...
12
votes
4answers
223 views

Set pixel aspect ratio?

Bug probably present through all versions of Mathematica [CASE:4081592] Does Mathematica have a feature to set the pixel aspect ratio of 2D images? For example, ...
7
votes
0answers
130 views

A bug in Derivative?

Update This is a bug in v11.3 or earlier and is fixed in v12. Original Post Check this out: ...
5
votes
1answer
85 views

Weird Export of .M4A format

When Exporting .M4A format audio, the duration is always 1. It seems that the audio is fast-forward played... Is that a bug and how can I fix it? Sample code: ...
4
votes
4answers
166 views

Volume of HexahedronElement with non-coplanar faces

Bug fixed in Version 12.0 I would like to calculate the volume of ElementMesh made of HexahedronElement. Even though ...
6
votes
1answer
117 views

Why does FindClusters put closer points into different clusters?

Bug introduced in 11.3 or earlier and persisting through 12.0 Bug isn't present in version 8.0.4 I am trying to do clustering and then obtained a plot as below:- ...
3
votes
0answers
126 views

Issues with the series expansion of Nielsen generalized polylogarithms in Mathematica 11.3

In Mathematica 9, 10.3 and 11.0 I can easily expand PolyLog[2, 2, x] around $x=1$ using ...