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.

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2
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2answers
775 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 ...
2
votes
1answer
45 views

Why do messages only appear first time I evaluate my compiled function?

I declare my compiled function: ...
2
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1answer
84 views

Breaking out of NDSolve

I am solving a coupled set of differential equations with NDSolve for 6 unknown functions of time. At a certain point in time, the system hits a singular point where the potential governing the ...
2
votes
1answer
62 views

Evaluating $n$-th derivative of a function at a given point [closed]

I have a function defined as follows: \begin{array}{ccccc} g & : & [-1,1] & \to & \mathbb C \\ & & x & \mapsto & \frac{1}{(x-z)^k} \\ \end{array} where $k$ is a ...
2
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1answer
100 views

a mysterious error in multiple symbolical integration

I am trying to do the following integration: ...
2
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2answers
156 views

Getting messages Rest::norest and Divide::indet from ContourPlot3D

Note: The bug described in this post is found in Mathematica version 9 and seems to have been fixed in version 10. Ok I don't know if it's a bug or what, but here's what I found: If I use this ...
2
votes
1answer
165 views

Mathlink works strangely

I have problem when using mathlink, the source code is quite simple: ...
2
votes
1answer
174 views

RevolutionPlot3D: Inconsistency between Mathematica 8/Linux and Mathematica 9/OSX

The following code runs error-free in Mathematica 8.0 under Linux. ...
2
votes
1answer
280 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 ...
2
votes
1answer
32 views

Replace error messages with zeros in a table

I'm working on a project of Nuclear physics and I'm passing results of a simulation program to mathematica via a txt file. I then read the values I need to read and plot them. The problem is that ...
2
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0answers
107 views

Two problems with NDSolve when using Method -> Projection

I tried to solve a system first order differential equations together with a constraint equation. I use the Method -> Projection to check if the constraint holds ...
2
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0answers
131 views

Maximizing Large Multivariable Function over Region with Parameter Constraints

Brand new Mathematica user here. I have a complicated function to maximize, and thought I would try software like Mathematica instead of taking derivatives by hand. I found some Mathematica ...
2
votes
0answers
94 views

How to handle infeasible points in FindRoot?

I am calling FindRoot[f[x,y],{{x,xInit,xMin,xMax},{y,yInit,yMin,yMax}}] where for some points {x,y}, ...
2
votes
0answers
157 views

Export Notebook causes an INTERNAL SELF-TEST ERROR: Files2|c|1713 message

On my machine (Windows 8.1) and M10 the following two lines, that must be run on an already saved notebook, ...
2
votes
0answers
81 views

Locate Blow-up in NDSolve with Whenevent

At some point I get this error: ...
2
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0answers
135 views

“LinkOpen::linke : specified file is not a mathlink executable”

The following code runs fine if I run it interactively: ...
2
votes
0answers
86 views

How can you link Parallel Mapping and Error tracking

Following this question and the comments made, together with the information in this question, the following code allows error tracking and debugging very nicely. ...
2
votes
0answers
76 views

Finding and interpreting errors [duplicate]

This sounds like a fairly trivial question, but I can't think of any way to solve it. I am doing an extensive parameter sampling where a set of ODEs is used together with ...
2
votes
0answers
102 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 ...
2
votes
1answer
467 views

Inconsistent initial and boundary conditions

I have a 4th order nonlinear PDE with the following BCs and IC: ...
1
vote
1answer
1k 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 ...
1
vote
1answer
335 views

Plot has red 'film', no error message

I am encountering really strange behavior: I wrote a function that plots values some data. After executing the code the resulting plot has the red 'error' colour, but only momentarily (maybe 0.1 sec). ...
1
vote
1answer
160 views

Error message: Coordinate index 0 is out of range for the enclosing GraphicsComplex

I am unable understand following error message: Coordinate index 0 is out of range for the enclosing GraphicsComplex. How to fix it? Attached data here: pts and polygons. See also end of question. ...
1
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1answer
68 views

Turning Off Error messages locally

I'm trying to turn Off an error in an expression. ...
1
vote
1answer
344 views

Suppress warnings in ParallelTable

I'm using ParallelTable to evaluate a function that involves NIntegrate. There are a lot of ...
1
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2answers
231 views

Is this integration error from a misuse of Mathematica or is it my poor math skills?

I have input this: Integrate[1, f[t]*Exp[(v/V)*t]] That is $\large\int 1*d(f(t)*e^{\frac{v}{V}*t})$ I expected this output: $\large f(t)*e^{\frac{v}{V}*t} + C$ ...
1
vote
2answers
60 views

Maximum likelihood estimation based on frequency table

I have a frequency table of grades, I'm trying to estimate the distribution as a truncated normal distribution (a grade below 65 is a failing grade and doesn't count). Since I don't have the actual ...
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2answers
41 views
1
vote
1answer
69 views

For loop with MapIndexed and If [closed]

I have a for loop that uses MapIndexed and If to build a a list called avald1. The problem ...
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2answers
70 views

Print argument of function that exceeds $RecursionLimit

Is there a way to print the argument of a function which results in a $RecursionLimit::reclim error? As an example, cosider the code ...
1
vote
1answer
62 views

Series and that old ivar error

I am trying to compare plots of the function (1+x)^{1/3} and its power series. The code for the power series generates an error message referring to an invalid variable: 'General::ivar: -1.09993 is ...
1
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1answer
167 views

Error when using FullForm with ?symbol

Information[symbol] shows information about a symbol and is equivalent to ?symbol. ...
1
vote
1answer
209 views

Bincounting a list

I'm a Mathematica novice here. I'm trying to execute the following code to add random 1's into a zero matrix, repeat this many times, and then bin/histogram the number of nearest neighbor 1s. Can ...
1
vote
2answers
177 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: ...
1
vote
1answer
91 views

FindFit::nrlnum: error with FindFit

I am trying to write a code to fit actual data of the orbit of a star with Mathematica 8. First I tried to write a code to fit a mock orbit, using the Application with differential equations (the ...
1
vote
1answer
80 views

FindRoot over a domain, but give domain boundary if no root exists

I call r = x /. FindRoot[f[x] == 0, {x, 0, -5, 5}] f[x] is always monotonic, but sometimes it doesn't have a root in the ...
1
vote
1answer
92 views

Warning and Errors during Compile

I defined a compiled function cf = Compile[{{x, _Integer}, {n, _Integer}}, z = (n^x); Binomial[n, #]* StirlingS2[x, #] *(#!)/z & /@ Range[x]]; and I ...
1
vote
2answers
76 views

CDF of TransformedDistribution Not Returned And No Error Message Produced

I am unable to get Mathematica to return the CDF of a distribution produced by TransformedDistribution. It "executes" for 6 hours on my machine and then returns a blank plot. Could someone execute the ...
1
vote
1answer
546 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 ...
1
vote
1answer
857 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 ...
1
vote
1answer
53 views

How to do predicate logic in Mathematica

I'm trying to formalize and analyze the following reasoning: All equilateral triangles are isosceles triangles. Some triangles are not equilateral triangles. Therefore some triangles are not ...
1
vote
1answer
140 views

How to suppress a warning message

If I change $MinPrecision before running ListPlot[{{1, 2}}], there will be a warning in Mathematica 10. But there is no warning ...
1
vote
1answer
59 views

error message DSolve::“bvnul”

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1
vote
1answer
241 views

FindFit::nrlnum What am I doing wrong?

I have a model called qobs: ...
1
vote
1answer
123 views

OpenSQLConnection error

I used to be able to connect to a SQL Server database. I haven't run this program for a few months. I tried it today and it failed, so I went back to try OpenSQLConnection[] and got the following ...
1
vote
1answer
155 views

How can I pass in parameters for multiple controls to a function that returns a Manipulate?

For instance, I have a some "commands" that I use regularly, for example: ...
1
vote
1answer
1k views

Why do I get an error message when for this type of recursion?

When I type the following code: mus[] = 0; mus[x__] := First[List[x]] + mus[Rest[List[x]]] What one would think would happen is that if, ...
1
vote
1answer
113 views
1
vote
2answers
314 views

Error using Solve on Matrix Multiplication

I am trying to make a function the will find that value of $x$ in the following equation: $x.a=b$ all values of $x, a, b$ are matrices. The dimensions of $x$ are unknown, but $a$ and $b$ have the ...
1
vote
1answer
214 views

Skip one step of the loop if there is an NIntegrate::eincr message

Is there a possibility of skipping one step of a loop if in this step there appears an error like NIntegrate::eincr? After skipping, the loop should go to the next ...