# Fzf.kak stops working after updating to tmux 3.4

**URL:** <https://discuss.kakoune.com/t/fzf-kak-stops-working-after-updating-to-tmux-3-4/2406>\
**Category:** Help\
**Tags:** fzf, plugins\
**Created:** [February 19, 2024, 8:36am UTC](https://discuss.kakoune.com/t/fzf-kak-stops-working-after-updating-to-tmux-3-4/2406 "2024-02-19T08:36:40Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![joncol](https://discuss.kakoune.com/user_avatar/discuss.kakoune.com/joncol/32/1192_2.png) [@joncol](https://discuss.kakoune.com/u/joncol)\
**Post date:** [February 19, 2024, 8:36am UTC](https://discuss.kakoune.com/t/fzf-kak-stops-working-after-updating-to-tmux-3-4/2406/1 "2024-02-19T08:36:40Z")

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Hi, I’ve run into a weird issue.

After updating my (NixOS) system, it seems like the plugin fzf.kak has stopped working. When running any of its commands, there is no fzf split appearing. I only see the clippy popup with the help for the keyboard bindings. The `*debug*` buffer doesn’t show any related information.

Any ideas for how to debug this? Not much to go on, I know…

My fzf.kak configuration is pretty minimal:

```auto
plug "andreyorst/fzf.kak" config %{
  map global user f ": fzf-mode<ret>" -docstring "fzf"
}

```

In the command line, fzf seems to work fine still…

I already tried deleting my `~/.config/kak/plugins` directory and recreate it using `:plug-install`, but it didn’t do any difference.

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<div class="post-metadata">

**Author:** ![joncol](https://discuss.kakoune.com/user_avatar/discuss.kakoune.com/joncol/32/1192_2.png) [@joncol](https://discuss.kakoune.com/u/joncol)\
**Post date:** [February 19, 2024, 9:15am UTC](https://discuss.kakoune.com/t/fzf-kak-stops-working-after-updating-to-tmux-3-4/2406/2 "2024-02-19T09:15:58Z")

</div>

I think I narrowed this down to `tmux` having been updated from version `3.3a` to `3.4`. I don’t know why that is a problem though.

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<div class="post-metadata">

**Author:** ![krobelus](https://discuss.kakoune.com/user_avatar/discuss.kakoune.com/krobelus/32/616_2.png) [@krobelus](https://discuss.kakoune.com/u/krobelus)\
**Post date:** [February 20, 2024, 1:49pm UTC](https://discuss.kakoune.com/t/fzf-kak-stops-working-after-updating-to-tmux-3-4/2406/3 "2024-02-20T13:49:39Z")

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get tmux server and client logs

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<div class="post-metadata">

**Author:** ![limes1](https://discuss.kakoune.com/letter_avatar_proxy/v4/letter/l/ed8c4c/32.png) [@limes1](https://discuss.kakoune.com/u/limes1)\
**Post date:** [August 19, 2024, 4:00pm UTC](https://discuss.kakoune.com/t/fzf-kak-stops-working-after-updating-to-tmux-3-4/2406/4 "2024-08-19T16:00:15Z")

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I had this problem as well, the problem seemed to be from: [3.4 questions and comments · Issue #3836 · tmux/tmux · GitHub](https://github.com/tmux/tmux/issues/3836#issuecomment-1942216630)

Fix is easy enough as suggested there. For me, I was lazy and changed these lines to set to the empty string. Unfortunately we cannot upstream a real fix as the repo is archived. [fzf.kak/rc/fzf.kak at 6910bfb4c23cac59c17f5b7850f7bd49aba3e5cb · andreyorst/fzf.kak · GitHub](https://github.com/andreyorst/fzf.kak/blob/6910bfb4c23cac59c17f5b7850f7bd49aba3e5cb/rc/fzf.kak#L232-L233)

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<div class="post-metadata">

**Author:** ![joncol](https://discuss.kakoune.com/user_avatar/discuss.kakoune.com/joncol/32/1192_2.png) [@joncol](https://discuss.kakoune.com/u/joncol)\
**Post date:** [August 20, 2024, 6:54am UTC](https://discuss.kakoune.com/t/fzf-kak-stops-working-after-updating-to-tmux-3-4/2406/5 "2024-08-20T06:54:14Z")

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Thanks for the link, I went with `set global fzf_preview_tmux_height 50` (without the `%`), and it seems to have circumvented the problem.

It’s unfortunate that there’s no “official” fork of the fzf plugin…