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I'm using Emacs as a server started by the systemd user unit. And on any dired buffer when i try to do dired-do-shell-command or dired-do-async-shell-command I cannot autocomplete any program and need to write my command "by hand". If I start Emacs not as a server I have the desired behavior and can autocomplete on the minibuffer. To autocomplete I use tab.

I use the unit defined on the package and Emacs version 26.

For example, if I to autocomplete after typing libr, nothing appear. Neither with gre. But both libreoffice and grep are reachable.

When I press tab nothing is inserted, and minibuffer shows No matches.

result of getEnv "PATH" on emacs --server (emacsclient) : 

~/.opam/default/bin:/usr/local/sbin:/usr/local/bin:/usr/bin

result of `getEnv "PATH" on emacs : 

~/.opam/default/bin:~/bin:/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/lib/jvm/default/bin:/usr/bin/site_perl:/usr/bin/vendor_perl:/usr/bin/core_perl

Any idea how I could solve this issue ?

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    I'm assuming this is a PATH issue. Try evaluating (getenv "PATH") in both contexts. This question might be a duplicate of many PATH questions here.
    – user12563
    Jul 10, 2019 at 15:13
  • Just to be sure, you might like to tell us how you requested completion (presumably by hitting TAB) and give us a specific program you tried and which obviously should be completed (e.g. grep). Also worthwhile would be to specify what happens instead of completion: does TAB do nothing at al, or insert a TAB some whitespace, or ...?
    – Stefan
    Jul 10, 2019 at 18:11

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