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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5
votes
1answer
108 views

Strange Tilt on error notification

I was testing the source code of the answers to this question. And when I tried this response and maxed out most of the manipulators, this is what I got. What went wrong that the errors are ...
5
votes
1answer
127 views

How to use Message with an error string without predefining it first?

I need a very simple error reporting using Message. But I do not want to pre-define each error message separately as shown What are the best practices / most common / idiomatic ways to report errors ...
5
votes
1answer
214 views
5
votes
1answer
93 views

Compilation of `Total` with CompensatedSummation

I sometimes obtain an unexpected error when trying to call a compiled version of Total with compensated summation turned on. More specifically I define ...
5
votes
2answers
107 views

Automatically detect largest interval over which NDSolve can find a solution

Question: Consider the following numerical resolution: NDSolve[eqn, {x1[t], x2[t], y[t]}, {t, tmin, tmax} where eqn, ...
5
votes
1answer
86 views

Error messages from TensorContract and TensorReduce

I am struggling with a few errors when using symbolic tensors. I am using mathematica 9.0.1.0, linux x86. The following code generates what seems to me an incorrect tensor, this is the smallest ...
4
votes
2answers
242 views

Indeterminate expression. Where?

Consider the following: ...
4
votes
1answer
143 views

How can I prevent a Plot expression from evaluating points forbidden by its RegionFunction?

I just ran into this and it had me scratching my head for a good while. Say I have a function which may produce error messages for certain inputs, like e.g. ...
4
votes
1answer
103 views

Issues with $MachineEpsilon

I'm attempting to add $MachineEpsilon to numbers I am pulling from the domains of 3 interpolating functions. I pulled 3 numbers, and for one of these numbers adding ...
4
votes
1answer
255 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: ...
4
votes
2answers
128 views

'kEINVALErr' error on startup

I have been using Mathematica 8 on an OS X system for quite a while now, but this morning it threw this error at me when I started the program up: Assertion 'kEINVALErr' failed at ...
4
votes
1answer
392 views

Differential Equations with Matrices

I'm trying to implement the differential equation of a Cellular Neural Network in Mathematica as seen below: ...
4
votes
1answer
2k 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: ...
4
votes
1answer
63 views

The specified setting for the option FEFloatIterator cannot be used

I am currently trying to get a numerical simulation running where one variable is iterated over many orders of magnitude. As the calculation takes pretty long, I would like to display a ...
4
votes
1answer
344 views

Error Interpretation in NIntegrate

I am using a recursion algorithm developed by Migdal for Lattice Field Theory, and I have the following code: ...
4
votes
1answer
774 views
4
votes
1answer
57 views

Show error messages from collapsed sections

I've got a fairly long notebook. I like to have most of the sections collapsed. If I evaluate the entire notebook I don't see errors in the collapsed sections unless I expand them. I did see that I ...
4
votes
1answer
157 views

CUDALink Error: A CUDALink kernel timed out?

I'm following the CUDALink tutorial [ http://reference.wolfram.com/language/CUDALink/tutorial/Introduction.html ] and everything is going fine until I get to the part that calls CUDADot on the ...
4
votes
1answer
127 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 ...
3
votes
2answers
327 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 ...
3
votes
2answers
153 views

Interpolation function error: Interpolation::femimq and Interpolation::fememtlq

In Mathematica 10 the following command ...
3
votes
3answers
447 views

Need help with exception handling

I have read the docs for Catch, Throw, and friends multiple times, and I confess that I find them utterly incomprehensible... ...
3
votes
1answer
376 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 ...
3
votes
3answers
609 views

StreamPlot using NDSolve gives error messages

StreamPlot[{x[0], x'[0]} /. NDSolve[{x''[t] == 1, x'[0] == v0, x[0] == x0}, {x, x'}, {t, 0, 1}], {x0, -2, 2}, {v0, -2, 2}] The above code gives me the errors ...
3
votes
1answer
132 views

How do I format Compile[] correctly?

My Mathematica skill is still rusty, so kindly bear with me. I'm having problem formatting expression to compile the function correctly: $\sum _{g=1}^G \sum ...
3
votes
1answer
168 views

Set gives an unexpected error message (Set::partw)

Here is a minimal example: s = 1 /(a + b[3]) + 1 /(2 a + b[3]); s[[1]] = Sum[s[[1]] /. b[3] -> k, {k, 3}] s[[4]] s[[4]] = Sum[s[[4]] /. b[3] -> k, {k, 3}] ...
3
votes
2answers
426 views

How to set the initial condition? (to make IC and BC consistent)

I want to find the initial condition which fits mixed boundary condition of Phi[r, Theta, t]. The original initial condition in text is Phi[r, Theta, 0] == 1 . ...
3
votes
1answer
282 views

FunctionInterpolation Errors / Question re Evaluation Order and Options

I have using Mathematica functions that takes a Cartesian coordinate relative to the Earth (xyz) and converts it to a latitude, longitude, and altitude (lla). And here it is: ...
3
votes
1answer
106 views

a mysterious error in multiple symbolical integration

I am trying to do the following integration: ...
3
votes
1answer
220 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 ...
3
votes
1answer
228 views

The front end encountered an error while processing a “NotebookPredictions” packet

I occasionally get the error The front end encountered an error while processing a "NotebookPredictions" packet. I cannot find any documentation for this error message online. It does not ...
3
votes
1answer
460 views

Exception/Error handling using returns codes

There is good explanation available for error handling on this and similar links. Here there is information on handling inappropriate input arguments and handling unprocessed functions using ...
3
votes
0answers
59 views

NIntegrate::ncvbr: How should we interpret and handle this error not mentioned in any documentation?

I have some user-defined module describing my integrand which has to be computed numerically (it's much more complicated than this but bear with me): ...
3
votes
0answers
289 views

Numerically solving a system of PDEs where one function is composed with the other

I'm trying to solve the following system using NDSolve: $$ \begin{align} u_t(x,t) &= u_{xx}(x,t) - v(x,t) \\ v_t(x,t) &= u(v(x,t),t) \end{align} $$ with ...
3
votes
0answers
56 views

SiegelTheta fails to evaluate when given proper arguments

SiegelTheta often returns error messages when I give it arguments that should be of the correct form. For instance, I have a numerical matrix like ...
2
votes
4answers
414 views

How to plot a graph from it's incidence matrix?

I'm using Mathematica v9 and am trying to draw a graph by using it's incidence graph, but it won't draw it, which occurs an error "is not a valid incidence matrix.". But I've checked my matrix, and ...
2
votes
1answer
3k 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
1answer
5k views

How do I identify the source of a “Tag times protected” error?

I have some code that looks like Table[ a = 1; b = {2, 3} c = i;, {i, 2} ] which gives an error: Set::write: Tag Times in c {2,3} is ...
2
votes
1answer
1k views

Mathematica Can't Evaluate This?

I am trying to find the inverse function of $\frac{\ln{x}}{x^2}$ in Mathematica. I am using the Solve[] function to find the inverse (yes, I know about ...
2
votes
1answer
179 views

Compile a MeijerG function [duplicate]

I am not very experienced with Compile, I tried to use it for a Meijer-G function ...
2
votes
1answer
361 views

Suppress warnings in ParallelTable

I'm using ParallelTable to evaluate a function that involves NIntegrate. There are a lot of ...
2
votes
3answers
434 views

How can `SquareWave` be used as the input in `OutputResponse`?

I'd like to compute the response of a TransferFunctionModel when driven by a SquareWave. Here's a simple example, ...
2
votes
1answer
811 views

A combination of Set::setraw and Set::shape errors

Please consider the following toy code: ...
2
votes
1answer
94 views

Possible to Solve a LocationEquivalenceTest?

I have 5 groups, each containing around 20 elements. These elements are all dependent on x. For example: Set1 = {1.5x + 1, 2x + 0.5, 1 x + 1, ...} etc. Now, I want ...
2
votes
2answers
591 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: ...
2
votes
1answer
168 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 ...
2
votes
1answer
639 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
75 views

Why this error?

f[x_] := Piecewise[{{1, -0.5 <= x <= 0.5}}, 0]; ProbabilityDistribution[ Integrate[f[a], {a, x - 0.5, x + 0.5}], {x, -2, 2}] output: "Unable to prove that ...
2
votes
1answer
559 views

Infinite Expression Error from NDSolve

I am trying to solve a differential equation numerically. So I have ...
2
votes
2answers
2k views

NMinimize with defined function call getting error NMinimize::nnum

I want to call the NMinimize function for my own defined calculations but I got an error. Below is a simple example. ...