ValueError: Session requires a `session_id`

[vn-ki]

I am getting the following error in all configurations. (I tried the config from the readme as well)

Traceback (most recent call last):
  File "/home/vn-ki/.local/bin/tmuxp", line 11, in <module>
    load_entry_point('tmuxp==1.4.0', 'console_scripts', 'tmuxp')()
  File "/usr/lib/python3.6/site-packages/click/core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/click/core.py", line 697, in main
    rv = self.invoke(ctx)
  File "/usr/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/usr/lib/python3.6/site-packages/click/core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/lib/python3.6/site-packages/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/click/decorators.py", line 17, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/home/vn-ki/.local/lib/python3.6/site-packages/tmuxp/cli.py", line 602, in command_load
    load_workspace(config[-1], **tmux_options)
  File "/home/vn-ki/.local/lib/python3.6/site-packages/tmuxp/cli.py", line 328, in load_workspace
    builder.build()
  File "/home/vn-ki/.local/lib/python3.6/site-packages/tmuxp/workspacebuilder.py", line 141, in build
    session_name=self.sconf['session_name']
  File "/home/vn-ki/.local/lib/python3.6/site-packages/libtmux/server.py", line 511, in new_session
    session = Session(server=self, **session)
  File "/home/vn-ki/.local/lib/python3.6/site-packages/libtmux/session.py", line 42, in __init__
    raise ValueError('Session requires a `session_id`')
ValueError: Session requires a `session_id`

[mayanksuman]

The same error occurs for me. I am using following versions of programs/libraries.

tmuxp 1.4.2
libtmux 0.8.0
python 3.6.8
tmux 2.8

I have also checked with git master (@03de018) version of tmuxp, the problem still exist.

[trodery]

I too had this issue and I took the time to dig a bit deeper into it as I had one environment where I saw the expected (non-broken) behavior and another with the ValueError: Session requires a 'session_id' problem.

There is command that is ran via subprocess (I believe) which invokes tmux to provide some information in a tab delimited format for parsing. Here's a screenshot showing the command/syntax that is issued to tmux outlined in red:

This screenshot shows the output that is returned from that command (outlined in red) and as you can see it is not tab delimited.

The environment that was broken was a docker container, and as it turns out, I had been a bit lazy in its creation and skipped the locale generation part. After properly setting up all the locale and my shell's LANG environment variable to en_US.utf8, everything started working as expected.

Analyzing the output again in the debugger shows the properly formatted string.

TL;DR - Check your locale settings and shell LANG variable as the string libtmux is expecting to see when invoking tmux is improperly formatted.

[mayanksuman]

@trodery Can you please post the output of locale command in bash. I have tested my locale and LANG variable and they all seem to be fine. Other softwares do not have any issue with my locale setting.

My locale is set to

LANG=en_IN
LANGUAGE=
LC_CTYPE="en_IN"
LC_NUMERIC=en_IN.UTF-8
LC_TIME=en_IN.UTF-8
LC_COLLATE="en_IN"
LC_MONETARY=en_IN.UTF-8
LC_MESSAGES="en_IN"
LC_PAPER=en_IN.UTF-8
LC_NAME="en_IN"
LC_ADDRESS="en_IN"
LC_TELEPHONE="en_IN"
LC_MEASUREMENT=en_IN.UTF-8
LC_IDENTIFICATION="en_IN"
LC_ALL=

Hence, I suspect that the tmuxp might not support any other English locale except en_US.UTF-8.

[trodery]

Here's the output prior to moving to an English locale:

LANG=
LANGUAGE=
LC_CTYPE="POSIX"
LC_NUMERIC="POSIX"
LC_TIME="POSIX"
LC_COLLATE="POSIX"
LC_MONETARY="POSIX"
LC_MESSAGES="POSIX"
LC_PAPER="POSIX"
LC_NAME="POSIX"
LC_ADDRESS="POSIX"
LC_TELEPHONE="POSIX"
LC_MEASUREMENT="POSIX"
LC_IDENTIFICATION="POSIX"
LC_ALL=

The only other problem I experienced was with click which demanded a UTF-8 locale.

[rawsp33d]

I have this problem, but didn't used to. The only thing I know of that changed somewhat recently was tmux itself, which is now 2.9a.

[sica07]

I have the very same problem since last evening (after a system update)

[trodery]

@sica07 What's the output of the locale command in bash?

[tony]

@mayanksuman If it possible to try doing LANG set to en_IN.UTF-8? Can you let me know the session name in unicode? (I guess just pasting it here would be sufficient). As well as python -V, tmux -V and tmuxp -V

Hence, I suspect that the tmuxp might not support any other English locale except en_US.UTF-8.

Potentially. I have a feeling it may be click or tmux wanting UTF-8.

http://click.palletsprojects.com/en/5.x/python3/#python-3-surrogate-handling

@trodery Can you let me know the session name being used ? As well as python -V, tmux -V and tmuxp -V?

@rosshadden @sica07 Can you let me know the output of locale, tmux -V, tmuxp -V and python -V?

[tony]

@vn-ki Can you show your session yaml file, locale, python -V, tmux -V, tmuxp -V and the command you're using to load the file?

[trodery]

@tony Unfortunately that was so long ago that I don't even remember what I was using it for at the time. It is no longer being used. Python was 3.6 but that's all I remember.

[sica07]

@tony

$ locale
LANG=en_US.utf8
LANGUAGE=en_US.utf8
LC_CTYPE="en_US.utf8"
LC_NUMERIC="en_US.utf8"
LC_TIME="en_US.utf8"
LC_COLLATE="en_US.utf8"
LC_MONETARY="en_US.utf8"
LC_MESSAGES="en_US.utf8"
LC_PAPER="en_US.utf8"
LC_NAME="en_US.utf8"
LC_ADDRESS="en_US.utf8"
LC_TELEPHONE="en_US.utf8"
LC_MEASUREMENT="en_US.utf8"
LC_IDENTIFICATION="en_US.utf8"
LC_ALL=en_US.utf8

 $ python -V
Python 2.7.13

$ tmuxp -V
tmuxp 1.5.4

[em-winterschon]

I ran into the same issue as the original bug report while using tmux 3.0a and tmuxp 1.5.4. Setting the following in ~/.bash_locale and then sourcing it at the end of my .bashrc file resolved the issue.

I have tmux installed as a compiled binary from the release page source, and tmuxp was installed via pip3, using Python 3.5.2.

## Use UTF-8 everywhere                                        
export LANG=en_US.utf8                                         
export LANGUAGE=en_US.utf8                                     
export LC_CTYPE="en_US.utf8"                                   
export LC_NUMERIC="en_US.utf8"                                 
export LC_TIME="en_US.utf8"                                    
export LC_COLLATE="en_US.utf8"                                 
export LC_MONETARY="en_US.utf8"
export LC_MESSAGES="en_US.utf8"
export LC_PAPER="en_US.utf8"                                   
export LC_NAME="en_US.utf8"                                    
export LC_ADDRESS="en_US.utf8"                                 
export LC_TELEPHONE="en_US.utf8"
export LC_MEASUREMENT="en_US.utf8"
export LC_IDENTIFICATION="en_US.utf8"
export LC_ALL=en_US.utf8