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I recently installed Tmux and became really glad for it. All of a sudden I though it would start throwing an error when I try to create a new session from within my terminal:

tmux new -s my-session

will cause the application to crash and only return


and put the following on the next command line:


Being new to Tmux I have no idea how to fix this issue. Does anybody recognize this error and knows how to fix it?

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2 Answers 2

up vote 4 down vote accepted


set-option -g default-command "reattach-to-user-namespace -l zsh"

from the configuration fixed the problem for me.

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Seems to me as specific problem, Wasn't 62;9;c the line & column index in configuration file where error raised? – Sneetsher Apr 3 '14 at 8:54
Does this pinpoint the location in the config where it encountered an error? – Severin Apr 3 '14 at 9:01
I don't know, but I'm asking if you know? or you can confirm if so? – Sneetsher Apr 3 '14 at 9:21
Just checked and the error occured on line 27, so nothing to go on from 62;9;c – Severin Apr 3 '14 at 9:23

I ran into this problem, and the reason was that the shell path was wrong in my .tmux.conf

set -g default-shell /usr/local/bin/fish

It couldn't find the shell, so it crashed. You should probably check whether your default shell's path is correct.

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your answer isn't clear... what is the correct path? – Graham Aug 17 at 8:24
use the command which to locate where the file is, for example: which fish – Syl Aug 19 at 20:24

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