How to autoload a few user-def funcions?.

For example the function


saved in a .nb file or in a .m file

I tried creating in "c:\Program Files\Wolfram Research\Mathematica\11.3\SystemFiles\Autoload" a dir MyFuncs and a subdir MyFuncs/Kernel with init.m whose content is


Another test was

$Path=Join[$Path, {"e:\Users\......\Files\Mathematica11_3"}];

and then


I´d like to load a fes user defined functions in an easy and practical way, whitout lot of complications. If it were possible from the files dir.

I was reading a lot of posts but whitout success

  • 2
    $\begingroup$ Try using init.m (reference.wolfram.com/language/ref/file/init.m.html) $\endgroup$ Dec 7, 2020 at 14:59
  • 1
    $\begingroup$ Also, do not modify anything inside of the installation directory. $\endgroup$
    – Szabolcs
    Dec 7, 2020 at 15:11
  • $\begingroup$ You should run your definitions and save them after into the .mx file by DumpSave["file.mx"]. After this, it can be loaded easily by Get. $\endgroup$
    – Rom38
    Dec 7, 2020 at 15:44
  • $\begingroup$ @RolfMertig I tried with init.m in several ways, It was not helpful. $\endgroup$
    – Mika Ike
    Dec 7, 2020 at 17:03
  • 1
    $\begingroup$ It should work. Where did you put MyFunc.m ? $\endgroup$ Dec 7, 2020 at 20:43

1 Answer 1


I also found this not to be straightforward. This is the protocol I eventually adopted;

  1. Put your functions in a package e.g. myStuff.m.


(*functions to be exported go here*)

myFunc1::usage="explain how to use your function here if you wish"

myFunc2::usage="or this can be empty quotes"


(*function definitions, including any private functions go here*)

myFunc1[x_] := Module[{a=0}, If[x>a, Happy, Sad]];

myFunc2[x_] := myPrivateFunc1@x + 1;

myPrivateFunc1[x_] := x^2;



  1. You now need to add the path to myStuff.m in a persistent manner.

    $Path = Join[$Path,{"C:\\dir1\\dirWhichHasMyStuff"}]

    InitializationValue[$Path] = $Path

  2. If you use <<myStuff` now, it should work. However, if you want it to be autoloaded, you need to add it as an initialization context.

    InitializationValue[$InitializationContexts] = {"myStuff`"}

(Obviously, if you already have other pre-existing initialization contexts, just add it to the existing list otherwise the old ones will be overwritten.)

The package will automatically be loaded next time you start a kernel.

  • $\begingroup$ Thank you. It works. But now I want to go back to the past. I deleted the package, now whenever I open Mathematica, it gives an error about the deleted package. How to achieve package to be non-autoloaded again. $\endgroup$
    – HD239
    Dec 13, 2021 at 11:06
  • $\begingroup$ You need to remove the package from the list of initialization contexts. If you have no other packages you want to autoload, just do; InitializationValue[$InitializationContexts] = {} Otherwise just list the packages that you DO want to be autoloaded. $\endgroup$ Dec 14, 2021 at 13:57

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