# Questions tagged [error-tracking]

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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 ...
58 views

### 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 ...
61 views

### 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" (...
45 views

### RegionPlot outputs SystemReduceDump

I'm using Solve[] to find the solutions to a system of equations, then checking their stability in a Hessian using ...
81 views

### 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 ...
83 views

### 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 ...
53 views

### 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 ...
90 views

### 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 ...
54 views

### 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 ...
53 views

### 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 == 1}, y, {x, 0, 30}] I think it ...
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64 views

### 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: ...
232 views

### 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 ...
170 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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### 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 ...
4k views

### SystemException[“MemoryAllocationFailure”, …] with NMaximize

I have a complicated analytical expression that needs to be maximized with respect to a parameter t: ...
109 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 ...
354 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, ...