Just as what is described in the title, the notebook behaves as if it were originally designed to not have the autocompletion functionality at all. Neither Ctrl+K nor F2 works. Furthermore, reinstalling Mathematica does not help, either.

What measures could be taken that possibly help to recover the autocompletion functionality? I suspect that some items in "Option Inspector" might be responsible but I can not find them.

It seems that quite a few people encounter this problem recently.

But, for now, the "$UserBaseDirectory deletion / renaming methods" cannot thoroughly settle this issue, can they?

  • $\begingroup$ Hard to say without more details. Provide the version of MMA and the system running it. Does this happen in a fresh-started kernel in a new empty notebook? Try clean-starting Mathematica, maybe there's some lingering user settings not being removed upon reinstall. I experience that Dynamic functionality sometimes interferes with autocomplete, but that shouldn't be the case in a fresh notebook and kernel. $\endgroup$
    – LLlAMnYP
    Nov 24 '17 at 13:05
  • $\begingroup$ @LLlAMnYP Windows 10 + MMA 11.2. It happens even in a freshly started one. $\endgroup$ Nov 24 '17 at 13:24
  • $\begingroup$ I'm not running this particular combination, so I can't check for myself. Most likely this is something very localized to your machine, in which case this is off-topic here and should be addressed to Wolfram support. $\endgroup$
    – LLlAMnYP
    Nov 24 '17 at 13:45
  • 2
    $\begingroup$ @LLlAMnYP I think I find the problem source. It is an unofficial package (github.com/rolfmertig/Shortcuts). It is very strange that the package causes this problem just recently. $\endgroup$ Nov 24 '17 at 15:20
  • $\begingroup$ @Kuba So far I have no definite conclusion on the origin. And I put forward my suspicion, neither necessary nor sufficient conditions. Unfortunately, every now and then I suffer from the annoying symptom, even with the "$UserBaseDirectory deletion therapy". $\endgroup$ Nov 28 '17 at 12:40


should resolve the issue at this point.

  • $\begingroup$ Yes that worked for me! Clean Start didn't help for me. $\endgroup$
    – Lou
    Nov 28 '17 at 15:47
  • 1
    $\begingroup$ It seems that I can use Shortcuts again. Could you please explain what happens? $\endgroup$ Nov 29 '17 at 5:46
  • $\begingroup$ Not sure, just saw the answer on the other forum. $\endgroup$
    – ktm
    Nov 29 '17 at 13:43

I had exactly the same problem today (I have Mathematica 11.2 and Windows 10): the autocomplete suddenly disappeared and neither Ctrl+K or F2 worked.

I don't have any additional packages installed; only the basic Mathematica. I tried clean-starting and that didn't work.

I managed to get autocomplete to work again by deleting the $UserBaseDirectory and restarting:

See also

I hope this helps!

It appears that Shortcuts` package can be involved but it is not clear how, see update in:


so before you delete whole $UserBaseDirectory you can try:

Needs @ "Shortcuts`"
  • $\begingroup$ So you didn't have Shortcuts` package installed? $\endgroup$
    – Kuba
    Nov 28 '17 at 12:26
  • $\begingroup$ I have the same problem since this morning. I don't have the shortcuts package installed. $\endgroup$
    – Lou
    Nov 28 '17 at 15:28
  • $\begingroup$ I don't think I had `Shortcuts`` installed (I am new to Mathematica and only installed from the iso nothing more). $\endgroup$ Nov 29 '17 at 12:48

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