# Mathematica notebook autocompletion completely disappears

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

PacletUpdate["EntityFramework"] 

should resolve the issue at this point.

• Yes that worked for me! Clean Start didn't help for me. – Lou Nov 28 '17 at 15:47
• It seems that I can use Shortcuts again. Could you please explain what happens? – Αλέξανδρος Ζεγγ Nov 29 '17 at 5:46
• Not sure, just saw the answer on the other forum. – 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: https://mathematica.stackexchange.com/a/85824/5478 so before you delete whole $UserBaseDirectory you can try:

Needs @ "Shortcuts"
UninstallShortcuts[]
(*+restart*)

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