# Tag Info

25

I can reproduce this on OS X in M10.0.2 and M9.0.1, so it looks like a bug. Please report it to Wolfram support. Table will automatically try to compile its argument above a table length threshold. This threshold is 250 by default and can be set to a different value using SetSystemOptions["CompileOptions" -> "TableCompileLength" -> ...]. It seems ...

16

The kernel crashes due to stack overflow. It is not safe to recurse too deeply. Increasing $RecursionLimit to values that are too great (and actually recursing that deep) risks a crash. (So yes, in a way it's due to insufficient memory, but it has nothing to do with memoization. It is due to insufficient stack space.) From the documentation: On most ... 15 The only solution I have found is to delete the contents of the directory given by: FileNameJoin[{$UserBaseDirectory, "Paclets"}] More specifically it appears to be sufficient to delete a single file: FileNameJoin[{$UserBaseDirectory, "Paclets", "Configuration", "pacletSiteData_10.pmd2"}] To prevent Mathematica freezing on the next start-up I need to ... 14 This bug has been fixed by a paclet update. This would be applied automatically whenever the functionality is used in a new kernel (as long as the paclet manager has updated its local site index, which typically happens once per session). To force an immediate installation, evaluate PacletSiteUpdate /@ PacletSites[]; PacletInstall["FFmpegTools"] which ... 13 Version: Mathematica Version 9.0.1.0, Microsoft Windows 64-bit OS: Windows 7 My mathematica crashed the same way. But only when it was not connected to the internet. I changed my default printer , and it fixed the problem. Follow these steps: Start menu>>Devices and printers There will be one/many printers listed there. The one with a green check mark on ... 12 This is quite good: f[d_, n_] := With[{x = Pick[d, Thread[Accumulate[d] - n < 0]]}, Scan[f[x, n - Total[#]] &, Subsets[Complement[d, x], {1, Infinity}]]] f[_, 0] := Throw @ True; weird[n_] := (DivisorSigma[1, n] > 2 n) && ! TrueQ @ Catch @ f[Most @ Divisors[n], n] Select[Range[10000], weird] // AbsoluteTiming (* {1.450002, {70, 836, ... 12 For an example, Internal`RadicalMemberQ[x y, {x^2 y, x y^3}] (* True *) which means that$x y$belongs to the radical of the polynomial ideal generated by$x^2 y$and$x y^3$. The method used to obtain the result is effectively Property 3 in the Gröbner Bases documentation, see http://reference.wolfram.com/language/tutorial/ComplexPolynomialSystems.html. ... 11 The crash may be avoided by turning off the Suggestions Bar. The reason is that one of the computations attempted by the predictive interface in the background, namely Solve[(0.000092742725 - 0.000015933052*I)* E^((0. + 3.1934271000000003*^-10*I)*t) - (0.0000981431 + 0.0001437239*I)* E^((0. + 1.4229429000000001*^-9*I)*t) + (0.0057300369 - ... 11 I'm not exactly sure what's causing the problem, but you generally want to avoid re-defining functions inside of dynamics like these. Every time the manipulate re-calculates the result, it redefines g and this seems to cause some sort of infinite update loop. It's better to do this: Manipulate[ Solve[g[x] == g[m x], x], {{m, 2, "Times"}, -10, 10, 0.1}, ... 10 This is a bug in Mathematica 10.0.0 and will be addressed in the first 10.0.x bug fix release (Mathematica 10.0.1). Thank you for reporting it and our apologies for any work lost because of this issue. 9 This crash has been fixed in version 10.2. In[1]:= if = NDSolveValue[{D[u[t, x, y, z], t] == 0, u[0, x, y, z] == 0}, u, {x, y, z} \[Element] Ball[], {t, 0, 1}, Method -> "FiniteElement"]; In[2]:= Export["if.wdx", if]; ... 9 This MathGroup discussion should answer your question, so I'll cite it here: On Tue, 29 May 2012 05:47:52 -0400 (EDT), JCW wrote: Please forgive my dragging up ancient history: I have been using Mathematica from version 2.2 through 7.0. I remember at least one (maybe two?) format conversions that were necessary to update old ... 9 The issue is reproducible on my 64bit Windows 7 machine. Actually, my PlotExplorer function also suffers from it, causing a crash. Here is the solution that worked for me. There are two versions of gobject-2-vs12.dll in your Mathematica installation (at least there is no other copy on my Windows machine): 64bit version, 347 KB, at:$InstallationDirectory\...

9

A bit too long for a comment. I think the hang is happening within Integrate: Block[{Integrate}, DSolve[y'[x] == Cos[2 x] + (Sin[2 x] + y[x]) y[x], y[x], x] /. { Integrate -> Inactive[Integrate]} ] Edit Here's the solution using withTimedIntegrate (as Micheal E2 pointed out in the comments): withTimedIntegrate[DSolve[y'[x] == Cos[2 x] + (Sin[2 x] + ...

8

Glad to note this is fixed in 10.0.1.

8

(* Input: Range of even numbers --- Output: Primitive weird numbers *) Block[{$RecursionLimit=Infinity}, subOfSum[ss_, kk_, rr_]:= Module[{s=ss, k=kk, r=rr}, If[ s+w[[k]] >=mm && s +w[[k]] <=m, t=False; Goto[ done](*Found*), If[s +w[[k]]+w[[k +1]] <=m, subOfSum[s +w[[k]], k+1, r-w[[k]]]]; If[s+r -w[[k]] &... 8 In fact, it is possible to tell Mathematica that "the notebook should automatically be saved after each piece of output generated by evaluation in it"; see documentation. Place SetOptions[$FrontEndSession, NotebookAutoSave -> True] NotebookSave[] at the beginning of a new notebook. When this code is executed, it asks the user where to save the ...

8

Specifying the DistanceFunction seems to fix it. Nearest[v, 39.28, {All, 8.57}, DistanceFunction -> (Norm[#1 - #2] &)] {39.28, 33.81, 33.56, 32.47, 31.12, 30.72} Note that the radius had to be changed also because Nearest will return points whose distance are strictly less than the radius.

8

This is a incompatible pointer problem. Just change int const *dims to mint const *dims (a total of 2 places), and the function will give correct results. My attempt to explain the difference: (Since I don't use C, I may make mistakes. Feel free to edit, or if there are any serious mistakes, I will remove this paragraph) mint refers to long in my system (...

8

As part of its algorithm, RandomPoint attempts to determine the region dimension by calling RegionDimension[region1] In version 10.4, the above gives up quickly without returning a result, and RandomPoint proceeds by using a heuristic estimate. But in version 11.0, RegionDimension tries harder to compute the dimension, which is a rather costly symbolic ...

8

This is a bug that can be worked around by disabling the Suggestions bar. Given the input, it tries several operations in the background (wrapped in TimeConstrained) and one of these -- a call to Flatten -- happens to crash when interrupted. The reason $HistoryLength = 0 or ending the input cell with ;Null; works is that it prevents the Suggestions bar ... 8 UPDATE: 24.03.2020 Checked this again on another machine running Windows 10 Pro x64 with Mathematica 12.0 and 12.1 installed. With version 12.0 the code below crashes the Kernel, while version 12.1 quickly returns the following: {{0.296875, 136}, {0.15625, 158}, {0.15625, 160}, {0.109375, 99}, {0.09375, 99}, {0.03125, 97}, {0.078125, 129}, {0.078125, ... 7 An observation, rather than an answer to the why question. The question suggests, that the problem might have something to do with the used lapack library. As it turns out, at least on my machine it doesn't. We can replace the C-code with the most simple routine which is taking an input tensor and returning exactly the same tensor as result. MTensor ta = ... 7 I saw this problem recently on the Wolfram Community website and answered it there. I'll copy my answer here (http://community.wolfram.com/groups/-/m/t/603973) I'm not sure if there's a simple way to prevent the issue. I would do this by basically reconstructing the ListVectorPlot Function from VectorPlot. To make it easy, I'll just make an Interpolation of ... 7 I had the same issue and it drove me crazy for a long time. Do you have any joysticks plugged in? Specifically, if you have a Logitech 'Extreme 3D Pro' joystick plugged in, it will cause Mathematica to crash upon interaction with any Graphics3D object. 7 Thank you for bringing this to our attention. I've done a preliminary investigation. On Unix only the kernel crashes, on Windows the FE crashes (or, more accurately, the FE crashes before the kernel has a chance to crash). Here are a few observations about the issue and your code. 1) You're mixing the Format world and the box world. If you want the kind ... 7 The "possible issues" section of the documentation for Polygon says that Degenerate polygons are not valid geometric regions A degenerate polygon is a polygon that has two or more vertices which are the same. The polygons that crash the kernel seem to be of this type. You can avoid the kernel crashes by not evaluating Area on such polygons, for example ... 6 The crash is because you set WorkingPrecision too low. Simply making WorkingPrecision higher solved the problem. (no crash) but notice that some roots print saying no significant digits available to display (pink boxes). I found this when I increased the WorkingPrecision to 5000 from 50, and then saw the message NSolve::precw: The precision of the ... 6 Not an answer but I just wanted to observe that the$RecursionLimit info box (whatever that is called) has a formatting error on my Mac: Update halirutan: When I set $RecursionLimit to say 30, then hover the symbol and click on the information$i\$, I sometimes get more than only wrong formatting:

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