10
$\begingroup$

When I open mathematica, there will pop-up some messages

enter image description here

where

<< package` 

is in the following file

FindFile["init.m"]

(*
    C:\Users\HyperGroups\AppData\Roaming\Mathematica\Kernel\init.m
*)

package content in the package file:

BeginPackage["Test1`"]

Test1::usage = "";

Begin["`Private`"];

Nearest[{1, 2, 3, 5, 8, 5}, 5]

End[]

EndPackage[]

I've tried * Mathematica * 10.1@Windows and 10.0[without this problem]

Seems the problem is related with some special functions, like Nearest

$\endgroup$
  • $\begingroup$ Problem confirmed in 10.1.0 under Windows 7 x64. $\endgroup$ – Mr.Wizard May 27 '15 at 14:45
  • 1
    $\begingroup$ should this be tagged as a bug? $\endgroup$ – P. Fonseca May 28 '15 at 5:38
  • 2
    $\begingroup$ Certainly it is one, but a fix would be (very) non-trivial. I tend to view it as more of a limitation. $\endgroup$ – ilian May 28 '15 at 14:18
17
$\begingroup$

Update

This has been fixed in a general way as of version 11.2.0. For more details, see this answer.


This is a known issue. It is not about package loading (or Nearest) but about Catch/Throw not working correctly when used during kernel initialization. For example, just putting the following in init.m

Catch[Throw[1]]

will result in similar behavior. See also Arnoud Buzing's post here.

The workaround I've been using is to run any init code depending on Catch/Throw as a scheduled task, e.g.

task := Get["package`"];
RunScheduledTask[task, {1}]
$\endgroup$
  • 1
    $\begingroup$ I must be missing something... nowhere in the OP's code is there a call to Catch or Throw. Should I understand that there are calls to these functions inside Nearest? $\endgroup$ – QuantumDot May 25 '16 at 9:01
  • 1
    $\begingroup$ @QuantumDot Yes, see e.g. TracePrint[Nearest[{1, 2, 4, 8, 16, 32}, 20], _Catch, TraceInternal -> True] $\endgroup$ – ilian May 25 '16 at 15:19

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.