Questions tagged [error-tracking]
The error-tracking tag has no usage guidance.
83
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Wolfram script exported from a Mathematica Notebook : errors actually warnings?
I have exported with the following script put at the beginning of my Mathematica notebook :
...
- 35
0
votes
1
answer
31
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Error handling of Databin
I am using Databin in a FormFunction and would like to check whether the DatabinAdd[] was successful. If it is not I get a \$Failed but I am unable to check for it. ...
- 3,302
1
vote
1
answer
70
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Plotting SD at each point
I have a question to plot out the standard deviation for my graphs:
How can I plot out the SD values in each point such that the max and min will start from 0 and not an offset standard deviation (SD) ...
- 302
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0
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17
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Interpolating function error: stack trace value and notebook give different values for the out of bound inputs
So, I get the input out of bound error, in the notebook out put.
""Input value {3.,1.5708,3.14159} lies outside the range of data in
the interpolating function."
Values {3,Pi/2,Pi}. ...
- 31
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0
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42
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The scaled boundary value residual error in NDSolveValue
What is the reason behind getting the following error?
...
2
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1
answer
74
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Trouble Finding the period of a function [closed]
I want to use Mathematica to compute the period of the function $F(t)=\cos t - \exp \left( - \sum_{k=1}^{50} \frac{\sin (kt) }{k} \right) -\sum_{k=1}^{50} \frac{\cos (kt)}{k}$, so here's my code
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user84483
4
votes
4
answers
141
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Error when placing legends
Consider the following plot
plot = ListLinePlot[{{{0, 0}, {1, 1}}, {{0, 0}, {1, .8}}}, PlotLegends -> Placed[{"1", "2"}, {.8, .4}]]
When I ...
- 4,138
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63
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WebSearch Stopped Working
I've been using 'WebSearch' and 'WebImageSearch' quite a lot recently to sample images for my work. However, these functions suddenly stopped working. When I evaluate, for example,
...
- 4,138
2
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0
answers
33
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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
...
- 4,138
1
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0
answers
47
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"Show Stack Trace" option always missing from error context menu
According to the Wolfram Language documentation, there should be an option in the context menu to see the stack trace:
But I never see that option in my context menus:
Is there a specific global ...
- 4,677
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0
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56
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What do do if Mathematica stops without error messages?
I am trying to run the relatively simple code
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0
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48
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Error in The Third Execution
I try to search the optimal solution of a large Problem using NMinimize and method Differential Evolution (DE).
I call the NMinimze inside a loop with 100 iteration, and each time with different ...
- 73
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0
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28
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Rigorous upper bound on the absolute approximation error of an output of `NIntegrate`
Is there a way to use Mathematica to obtain a guaranteed, rigorous upper bound on the absolute approximation error of an output of NIntegrate (as an approximation ...
- 569
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51
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1
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0
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37
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Why do I get the (NMinimize::nrnum) error and how to fix it?
I have an energy function which depends on the angles of the electrons({x} symbol for theta) and phase of electrons({y} symbol for phi). I am using NMinimize to minimize the energy with respect to {x}...
0
votes
1
answer
37
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Graph Plotting Error - NonLinearModel and 'neither a list of replacement rules nor a valid dispatch table' [closed]
I am trying to produce a nice looking graph from Mathematica. (if any background on that is required, I am happy to share, but I'll keep it short for now unless anyone is interested)
Question:
...
- 467
1
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0
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58
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Unexpected behaviour of SolveAlways
My problem is quite simple and I cannot spot if this is my mistake or some malfunction of mathematica.
I am using
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- 4,113
1
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0
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34
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spontaneously quitting kernel, assignment and packed arrays
I am having an issue where the kernel spontaneously quits, deep in a long code that I have used for quite some time without this issue.
I've tracked it down to an assignment of the form:
a[[All, All, ...
- 1,183
1
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0
answers
90
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Why is Mathematica saying this sequence tends to $0$?
I am a complete novice in Mathematica so please bear with me. I am trying to graph a sequence that converges to $\pi$ but after $27$ iterations Mathematica just goes crazy and I am not sure why. I got ...
- 553
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1
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152
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Error test failure for the following system
My question is about a reason of the inability of Mathematica to integrate the given system of differential equations, that depends on parameters, in a stable way: for some values of the parameters ...
- 3,544
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0
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189
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Mathematica stops working with no warning/error
I have some long computations on my Mathematica notebook.
For some reason they stop and Mathematica gives me no reason as to why. No warning. No erros.
If run the "Initialization Lines" (...
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0
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52
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RegionPlot outputs System`ReduceDump`
I'm using Solve[] to find the solutions to a system of equations, then checking their stability in a Hessian using ...
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1
answer
82
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Strange error not found in a monte carlo code, Infinite expression 1/0 encountered
I've been trying to code a kinetic monte carlo simulation for a dimerization reaction, 2M ---> D. However I have a kinetic Monte Carlo code for a first order decomposition reaction of AIBN (that's ...
- 13
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votes
1
answer
166
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How to implement an "if an error occurs"-condition in Mathematica programming?
In general Mathematica may return a value even if NDSolve has run into error.
A simple example is
...
user67126
1
vote
1
answer
59
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Why does the mix of Exclusions and SymbolicProcessing->0 sets my integral to $0$?
I am trying to compute a $5$-dimensional integral, which may or may not be zero. I do believe it is finite though, at least for the values $\epsilon$, $\sigma$ used here. The integral is given in the ...
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2
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130
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How to Quiet[] only the first argument of Check[]?
I have a Check of the form
Check[expr,failexpr, {NIntegrate::slwcon}]
If expr throws slwcon, I would like to redo the calculation with higher precision by ...
- 283
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1
answer
83
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Catching NDSolve Singularities
I am using NDSolve to solve a system of equations with changing initial conditions (I'm using NDSolve multiple times). However, for particular initial conditions I am getting an effective step size of ...
0
votes
2
answers
100
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NDSolve: How to perform a reverse integration consistency check?
Let there be the following NDSolve code:
s = NDSolve[{y'[x] == y[x] Cos[x + y[x]], y[0] == 1}, y, {x, 0, 30}]
I think it ...
- 53
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votes
1
answer
44
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How can I properly use Catch[] to prevent my program from quitting?
I am getting an error depicting an Uncaught Throw, with the accompanying code being returned:
Hold[Throw[$Failed, CURLLink`Utilities`Exception]]
I have managed ...
- 1,397
1
vote
1
answer
425
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Why does Mathematica just return Hold of my Input? [closed]
Example:
Solve[x^2 + a x + 1 == 0, x]
Output: Hold[Solve[x^2 + a x + 1 == 0, x]]
What is the problem?
Any child can solve this in its head
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88
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5
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1
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225
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Raise Warning/Error on invalid Matrix Addition and Multiplication
Consider the following code:
DiagonalMatrix[{1, 1, 1}] - 1
Mathematica interprets it in the way, that it substracts 1 from every matrix field while ...
- 844
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2
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189
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1
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0
answers
87
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raise error on type mismatch
Is there a best practice for raising an error on a type mismatch? For compiled functions I'm guessing the answer is the use of GeneralUtilities`WithMessageHandler. ...
- 12.3k
5
votes
1
answer
90
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Ignore message in `Check` without silencing
Check[expr,failexpr,checkedMessages] will evaluate expr and if it encounters any of the messages in ...
- 1,183
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0
answers
61
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customisable error checking, message handling code
I have an iterated computation running in a while loop, which is bound to fail at some point, at which point I want it to stop, e.g.
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- 1,183
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0
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How to get a value from Error message? [duplicate]
I've looked pretty hard for a solution to this issue with no luck.
Hope you could give me a clue:
When I run NDSolve I get the following error msg:
...
- 397
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670
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Kernel shutting down automatically with no error
What are the possible reasons why a kernel exits and the computation simply stops without printing out an error message?
In case the specific scenario is required, it is as follows but perhaps the ...
- 255
3
votes
1
answer
166
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Large residual error when solving a 2D BVP with NDSolve and Finite Element Method
I'm trying to solve a simple PDE (an inhomogeneous Helmholtz equation) in a disk domain with center at $(1,0)$ and radius 0.5 using the following commands
...
- 191
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2
answers
4k
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Histogram with Error bars
I have a dataset for which Mathematica easily creates a Histogram. However I also need Mathematica to show error bars corresponding to 3 standard deviations for ...
- 153
2
votes
1
answer
107
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How to catch error messages from parallel kernels
Doing something that throws out an error (warning):
ParallelTable[NIntegrate[1/Sin[10 t], {t, 0, W}], {W, 0, 10, 1}]
In parallel somehow limits a possiblity to ...
- 757
3
votes
1
answer
108
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Saving a log file if an error occurs
I am running a program that adds a message to a list after each completed cycle (about 5k cycles). Upon completion, the program saves the list to disk so I can review it.
However, if the program ...
- 5,320
2
votes
2
answers
596
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DSolve running forever
I have no idea how to speed this up. Does maple do a better job at solving this?
user53724
3
votes
2
answers
160
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How to track accumulated error?
If Im not wrong when we use the command N we are using float point numbers in machine precision, right? And the machine precision depends on the bits of the CPU ...
- 1,097
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0
answers
68
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Errors with NIntegrate: NIntegrate::ncvb and NIntegrate::slwcon
The image shows the array (W) I'm trying to integrate.
It gives the following errors:
1. NIntegrate::ncvb
2. NIntegrate::slwcon
I tried excluding the singularity points; adjusting the accuracy goal, ...
0
votes
1
answer
150
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Plotting of an error estimate of `NDSolve`
So, in an earlier post, (see here), I asked a question regarding a surface of section for a system of coupled non-linear ODEs. What I am after now, is the numerical precision of the results I get back....
- 707
4
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0
answers
205
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Adding an attribute crashes the system?
At some point I noticed the following errors just in the documentation:
And not only this one, this is not only for Manipulate, there were many others. Also the ...
- 657
1
vote
1
answer
122
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What is the best practice way to handle arithmetic exception in Mathematica
What is/are common way/s to handle what would be ArithmeticExceptions in Java in Mathematica/ Wolfram Language? The ugly code is the If...Continues in the innermost For Loop. How should I address this ...
- 271
36
votes
2
answers
1k
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How do I disable the stack tracing feature in Mathematica 11?
Bug was introduced in 11.0 and persisting through 11.1
It looks like the Mathematica 11 stack tracing feature (see red ellipsis in front of any warning message) prevents the garbage collector from ...
- 7,666
1
vote
1
answer
111
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Catching errors while mapping a solver over a list of parameters
Perhaps this question has a simple answer, I'm sorry but I unable to get my head around it. Here's a minimal description of my issue.
I have a an equation of the form ...
- 581