For questions on interpreting existing error messages that you have encountered, as well as writing and managing messages, assertions and checks for your own functions.
0
votes
0answers
30 views
Expressions like <<1>> [duplicate]
In a function where I call the Maximize function, I am getting an error that says
...
7
votes
2answers
323 views
Solving/Reducing equations in $\mathbb{Z}/p\mathbb{Z}$
I was trying to find all the numbers $n$ for which $2^n=n\mod 10^k$ using Mathematica.
My first try:
Reduce[2^n == n, n, Modulus -> 100]
However, I receive ...
11
votes
3answers
480 views
What is an “INTERNAL SELF-TEST ERROR”?
I get this all the time since updating to 9.0 (OS 10.8.2):
That's Clipboard|c|3015 for the benefit of anyone searching.
What does an "Internal self-test error" mean?
9
votes
2answers
189 views
How to find a specific error message?
Is there a way to find an existing error message in the System` context, that is used for a certain case? I want to include a message in a custom function that ...
1
vote
1answer
76 views
What does the Error Message in DSolve really mean?
Having this ordinary non linear differential equation
$$y'-x^2 (y+1)\cdot (y+2)^2= 0$$
with the boundary condition $y(4)=2$. When trying to solve this one with Mathematica by using
...
0
votes
0answers
126 views
A SetDelayed issue [closed]
I get
General::ivar: "-Cos[[Pi]/52] is not a valid variable.
when I call the function below
...
2
votes
1answer
65 views
Infinite Expression Error from NDSolve
I am trying to solve a differential equation numerically. So I have
...
0
votes
1answer
66 views
Error messages when using NInverseFourierTransform
I have two functions that I need to inverse Fourier transform and I was trying to get Mathematica to help me. I tried simply using theInverseFourierTransform ...
1
vote
1answer
98 views
Plotting a complex function [duplicate]
What does it mean if this message appears:
{Im[(1-E^Times[<<3>>] f)/(1-Power[<<2>>] f)]-0,Im[(1-E^Times[<<3>>] f)/(1-Power[<<2>>] f)]-0} must be a list of equalities or ...
21
votes
1answer
270 views
which is better, using Assert[] or manual checks on arguments and other computations?
I never used Asserts in Mathematica, but trying to see what advantage they have over just argument check and additional definitions of the function to capture unwanted input.
For example, which one ...
27
votes
3answers
381 views
No warning when extrapolating with Plot
One of the most annoying "features" of Mathematica is that the Plot family does extrapolation on InterpolatingFunctions without ...
13
votes
1answer
92 views
Standard message definition construct
Why are the messages almost always defined like this (at least in packages):
If[Not@ValueQ[function::usage], function::usage = "Usage message"]
and not just like ...
5
votes
1answer
147 views
Differential Equations with Matrices
I'm trying to implement the differential equation of a Cellular Neural Network in Mathematica as seen below:
...
0
votes
0answers
46 views
NDSolve::ndfdmc: Computed derivatives do not have dimensionality consistent with the initial conditions. >>
I am trying to solve this NDSolve problem and I am getting the above error and do not know why. Here is what I have:
...
3
votes
1answer
114 views
CreateCOMObject doesn't work on home edition
I can call an application named "PinPoint.Plate" with Visual Basic, Python and Mathematica version 8 but not with version 9. I can still call Excel though. How can I fix this? This is what I did:
...
0
votes
0answers
20 views
Error Handling with LinearProgramming and Aborting subsequent evaluations
I am using a inbuilt LinearProgramming solver to perform an optimization. It is essentially solving a matrix equation and searching for a solution that maximizes a ...
0
votes
1answer
91 views
Evaluating FindRoot at different starting points on a grid
I'm trying to evaluate the roots of a complex function at different starting points on a grid using Do[Do[FindRoot[g[z], {z, j + k*I}], {j, 10}], {k, 10}]. However, ...
2
votes
1answer
45 views
How to show error messages in current notebook?
I would like Mathematica to print error messages in current notebook together with output.
This is default option in Mathematica, but recently I turned it off somehow.
Now, I am getting output in ...
2
votes
1answer
99 views
Differences between ParametricPlot3D and NIntegrate
I have a function $f : \mathbb{R} \rightarrow \mathbb{R}^3$ defined in a rather nasty way in mathematica however it's a smooth function and what not. I am interested in $f'[t]$ and when I run it ...
6
votes
4answers
91 views
How to catch complete error message information
If I evaluate this expression:
Module[{}, 1/0;0^0]; msg = $MessageList
I get:
...
1
vote
0answers
61 views
Consistently annoying error messages in Mathematica 9 [duplicate]
Possible Duplicate:
Strange ::usage behavior in v9
Has anyone had any issues with a function, let's call it Function, which worked in Mathematica 8 getting the error message
...
10
votes
0answers
131 views
Quiet doesn't work with FindRoot when using Brent method
The following has no solution:
FindRoot[x == 1, {x, 0.25, 0, 0.5}]
And Mathematica correctly warns us:
FindRoot::reged: The point {0.5} is at the edge of the ...
3
votes
2answers
98 views
How can I get WhenEvent to recognize criterion I specify?
Using NDSolve I want to solve a differential equation till a quantity which is a function of the dependent variables reaches a certain value. My functions and criteria are complicated, but I am able ...
0
votes
0answers
55 views
Script works on desktop but not in command line on server
I'm running a pretty straightforward Mathematica script:
...
2
votes
2answers
198 views
Solving set of non-linear simultaneous equations gives PolynomialGCD::lgrexp error - what next?
I'm trying to solve a set of six simultaneous non-linear equations to get a numerical answer using NSolve:
...
5
votes
1answer
109 views
How can I deal with an NDSolve::ivone message regarding boundary values?
I have a question regarding the error message:
...
1
vote
0answers
80 views
Font Issues: “Like Resource 58” error
I'm running Mathematica 9.0.0 on a Macbook Air with OSX 10.6.8 and I've recently started having issues with the font in the program. All special characters are being replaced with other characters in ...
0
votes
1answer
196 views
How do I troubleshoot when I get a Part::partd or a Part::partw error?
Mathematica has produced the following error message:
Part::partd: Part specification ... is longer than depth of object?
What is partd?
I think I may ...
2
votes
0answers
74 views
StringMatchQ error messages printed to console while main notebook is sitting idle [duplicate]
Possible Duplicate:
Strange ::usage behavior in v9
I'm currently finishing up a Mathematica vector calculus package (MMA9.0 on Mac Os X), but have had a persistent problem that I haven't ...
-1
votes
1answer
95 views
Manipulate code creates error messages when file is opened
When I open the file containing the following code I get a series of error messages. Once I evaluate the cell with the code the error messages disappear. What is Mathematica doing when it opens a ...
7
votes
1answer
121 views
StringMatchQ and Alternative throws message in init.m
The report of this issue, which itself relates to code of my answer here, exposed a behavior I cannot explain. If I use StringMatchQ in combination with ...
1
vote
0answers
148 views
NDSolve error when solving a BVP
I'm trying to solve the following BVP with unknown parameters (p and phi) using NDSolve over the period {Pi, 2 Pi}:
...
1
vote
0answers
285 views
How to fix corrupted notebooks? [closed]
How to fix this error? Here is the error message:
"There appears to be an error in the file named below. You should close it without saving, then check the "Parse and load entire notebook into memory ...
2
votes
1answer
131 views
How can I remove unnecessary warning messages?
I updated Mathematica,CdfPlayer to new Version (9). I made a simple Application in Mathematica 9 and deployed into ...
5
votes
1answer
143 views
4
votes
1answer
517 views
FeynArts not working properly
So I have installed all FeynArts folders (from 3.5 to 3.7) with FeynCalc 8.0.1., and none of it is working properly :\
First I load the path to specific FeynArts package (3.5 for instance), then, by:
...
0
votes
0answers
67 views
Error changing edge thickness in a GraphPlot
I'm having some problems with the Mathematica graphics inspector. I want to make a graph with the following code:
...
3
votes
0answers
88 views
Dealing with errors and resuming the code after one
How can I write my Mathematica code so that it resumes at a specific place if any Message is displayed during the execution of an expression? For example, in Visual ...
1
vote
1answer
312 views
How to find local minima of a multivariate function with singularity?
I am working on a logistic regression problem which requires minimizing a cost function J[{theta0, theta1, theta2}, X, y] to find the optimal value for fitting ...
2
votes
2answers
293 views
Problem with NDsolve for a system of equations
I want to solve a system of differential equations which is not very complicated, but I cannot handle the problem with mathematica!!
Please have a look at the problem and result and help me with your ...
17
votes
2answers
597 views
Mathematica Debuggability
One of the things that I really dislike about Mathematica is its lack of debuggability compared to many other programming languages. Some of the problems arises from the functional nature of ...
10
votes
1answer
211 views
Check does not interrupt evaluation of the expression when a Message is emitted
On the surface, Check looks like a good method to use when you need to abort the evaluation of an expression whenever a Message ...
9
votes
4answers
283 views
Using Position (which requires a pattern) in the same manner as Select (which requires a criterion)
I am using Mathematica7. I have a list of lists (creatively named list in the following sample code) containing data. I would like to find the positions of the ...
0
votes
1answer
428 views
Stategies to avoid NIntegrate::slwcon error
I am trying to numerically evaluate an integral whose integrand depends on two parameters, say $(a,b)$ and when $b\gg 1$ I suspect (although it's not guaranteed) that the integrand is very small. Thus ...
4
votes
1answer
463 views
NonlinearModelFit::cvmit: Failed to converge to the requested accuracy or precision within 100 iterations
I have got a problem in my program with NonlinearModelFit:
...
0
votes
0answers
164 views
Derivatives in scripts [closed]
I have consistently been harrowed by this tiny issue.
When I Try to run my Mathematica script, I get this error message:
...
17
votes
4answers
731 views
Why does MatrixForm affect calculations?
This is a really newbie question, but it has me confused. Why does this code work without // MatrixForm and doesn't work with ...
2
votes
1answer
286 views
FindRoot Infinite expression 1/0 encountered error
I have 1 equation in 1 variable, which when I use Plot, looks like this:
...
2
votes
1answer
92 views
Printing a success message if no errors have yet been thrown in the current session
I plan to run a lengthy Mathematica script on a Linux terminal (by "a Linux terminal," I mean that I have text output only -- no GUI), using the program math. To ...
5
votes
3answers
246 views
ComplexInfinity/Indeterminate error when evaluating derivative
Motivation: I want to find the coefficients for the polynomial that is obtained when one adds together the first $n$ natural numbers to the power of $a$; that is, when you consider $1^{a} + 2^{a} + ...
