I am trying to remap this functionality: enter image description here to Ctrl+Space, by using this line in .vimrc

inoremap <C-Space> <C-n>

However, I can not seem to get it to work. If I press Ctrl+Space after starting up, I get this error:

E29: No inserted text yet

Which I suppose is already mapped to a clipboard which tracks your last input. I would rather swap the functionality as auto-complete is more important to me. What am I doing wrong?

  • Please clarify what you mean by "Autocomplete". – klaus Oct 9 '19 at 8:01
  • If it's native :h ins-completion you're talking about, then you should be good to go with inoremap <C-space> <C-n> – klaus Oct 9 '19 at 8:01
  • @klaus For what its worth, I was going to send a screenshot, but it stopped working so... Basically its when it gives you a box of options and keywords you can cycle through. – Anon Oct 9 '19 at 8:30

Your terminal send ^@ as <c-space> to vim, ^@ is ctrl-@, it's equivalent to <Nul> in vim, check :h keycodes if you have doubts.

You get E29: No inserted text yet error message because :h i_CTRL-@ is trying to insert previously inserted text (it doesn't exist).

To fix it, use:

inoremap <Nul> <c-n>


inoremap <c-@> <c-n>


map <Nul> <c-space>
map! <Nul> <c-space>
inoremap <c-space> <c-n>

Personally i think you should get used to <c-n>, it's one of the most useful shortcut key in vim.


I believe you’ve got the map syntax backwards (see :help :map): try

inoremap <C-Space> <C-n>

Also see :help ins-completion

  • You were right, I had it backwards, however the remap still has not worked. I updated the question; thanks for fixing that. – Anon Oct 10 '19 at 4:29

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