# Questions tagged [error-tracking]

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### Error messages in a notebook

I write on the Mathematica notebook NSum[(1 + k^2 + l^2 + m^2)^{-1.75}, {k, -Infinity, Infinity}, {l, -Infinity, Infinity}, {m, -Infinity, Infinity}] and it ...
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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 ...
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### How to disable roundoff error tracking in arbitrary precision arithmetic?

In my calculations I need some larger precision. But due to the fact that I iteratively refine the results to compensate for rounding errors accumulated in previous iteration, Mathematica's arbitraty ...
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### Why do I get number with Precision larger than error estimate?

I'm trying to integrate a large function like this ...
166 views

### How to get a list of indices at which errors occur during iteration

I have been looking at some of the questions regarding error handling but i think my problem is unique. I am running a Do-loop. I get errors only for certain values of the loop variable due to the ...
630 views

### Solution of a System of Equations Using Solve`

Part 1 I am trying to solve a simple system of equations as follows Solve[{A x^B == f, A y^B == g}, {A, B}] But I just get the error Solve::nsmet: This ...
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### How to plot a function whose constant parameters have associated uncertainties in Mathematica 8.0?

Let's assume I want to plot the function $f(x)=a + bx+ cx^{2}$, where experimentally known values of parameters $a, b$ and, $c$ are as follows: $a=1.01 \pm 0.18$ $b=0.92 \pm 0.11$ $c=2.2 \pm 0.2$ ...
223 views

### What is the simplest way to determine which call to a superfunction has generated a Message?

I have a complicated function which contains many calls to NIntegrate, NSolve, FindRoot and ...
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### Error in the exercise or in mathematica settings

I am going through Kenneth Rosen's book about discrete mathematics. Chapter 1 there is a example where we build functions to check valid conclusions. Here is the code: ...
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### Goal optimization: finding the best combination of capacitors and resistors resulting in given properties

I want to edit @MarcoB answers (because the code he gave doesn't answer the question appropriately)->(the function that need to be optimised is not implemented as asked) But it seems like I am having ...
146 views

### How to count the actual occurence of a warning message in a Do loop?

I am running a lot of simulations to fit a model to randomly generated data. Sometimes the fitting converges properly sometimes it does not, but it will give you the fitting parameters anyway. I would ...
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### MathKernel doesn't return all Messages

In Mathematica I run this command: Plot[Sin[x], {x, 1, 15}, GridLines -> error] It generates a Plot with this error message: A GridLines specification ...
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### 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 ...
201 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. ...
211 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 ...
445 views

### How to write a function-defining function which stores the function arguments in a stack?

I have a function-defining function SetAttributes[DefFn, HoldAll]; DefFn[f_[args___], body_] := f[args] := body; I am trying to modify this function to record ...
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### Adding Trace produces error messages

This is very strange. As I was trying to debug this problem, I noticed when I add Trace then I get lots of internal errors generated. This also happens the first ...
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### 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 ...
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### SystemException[“MemoryAllocationFailure”, …] with NMaximize

I have a complicated analytical expression that needs to be maximized with respect to a parameter t: ...
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### 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, ...
138 views

### How to output (anything) if any error happens

I have long code which goes through iteration process. some times I get error messages. I want to get the iteration numbers (or any kind of output indications) when errors happen. for example, how ...