Mod-script-pipe - Works fine and then file not found

tienow · January 25, 2019, 3:25pm

Good Morning,

I’ve managed to use mod-script-pipe to script Audacity (on Win 7 and 10) and it’s working fine, except that after launching a few times the script I seem to lose the connection from Python to Audacity and I get the following error:

FileNotFoundError: [Errno 2] No such file or directory: ‘\\.\pipe\ToSrvPipe’

If I try to launch the script again I then get the following error:

Read (or Write) from “\.\pipe\FromSrvPipe”
…does not exist. Ensure Audacity is running with mod-script-pipe.

I’m using the pipe-test.py file (please see code below) to check the connection with Audacity before running my script. Sometimes if I close Audacity and re-open it the script will work again for a few times and then will give me the same error, sometimes re-opening Audacity doesn’t work. I don’t really understand what the pipe-test.py is trying to (what is path “'\\.\pipe\ToSrvPipe”?), is there anything I could do or add to the code to stabilize the connection between Python and Audacity? I

Thanks in advance for your response

steve · January 25, 2019, 3:47pm

You’ve not attached the code.

I’m not very familiar with names pipes on Windows either, but “pipeclient.py” should provide an easy way to use pipes on all platforms:

github.com

audacity/audacity/blob/master/scripts/piped-work/pipeclient.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

"""Automate Audacity via mod-script-pipe.

Pipe Client may be used as a command-line script to send commands to
Audacity via the mod-script-pipe interface, or loaded as a module.
Requires Python 2.7 or later. Python 3 strongly recommended.

======================
Command Line Interface
======================

    usage: pipeclient.py [-h] [-t] [-s ] [-d]

Arguments
---------
    -h,--help: optional
        show short help and exit
    -t, --timeout: float, optional

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paulocress · November 8, 2021, 7:16am

When you open a file with the name “filename.ext”; you are telling the open() function that your file is in the current working directory . This is called a relative path.

file = open(‘filename.ext’) //relative path

In the above code, you are not giving the full path to a file to the open() function, just its name - a relative path. The error “FileNotFoundError: [Errno 2] No such file or directory” is telling you that there is no file of that name in the working directory. So, try using the exact, or absolute path.

file = open(r’C:\path\to\your\filename.ext’) //absolute path

In the above code, all of the information needed to locate the file is contained in the path string - absolute path.

eulerix · December 7, 2023, 12:46am

I also have the same problem but don’t know how to solve it. Testing with GitHub scripts has this problem. Can you tell me how to solve this problem?
[audacity/scripts/piped-work/pipe_test.py at master · audacity/audacity · GitHub]（https://github.com/audacity/audacity/blob/master/scripts/piped-work/pipe_test.py）
PS C:\Users\Eul> python --version
Python 3.7.6
NPP_SAVE: C:\Program Files (x86)\Audacity\Plug-Ins\pipe_test.py
CD: C:\Program Files (x86)\Audacity\Plug-Ins
Current directory: C:\Program Files (x86)\Audacity\Plug-Ins
C:\Users\Eul\AppData\Local\Programs\Python\Python37\python.exe “C:\Program Files (x86)\Audacity\Plug-Ins\pipe_test.py”
Process started (PID=17324) >>>
pipe-test.py, running on windows
Write to “\.\pipe\ToSrvPipe”
…does not exist. Ensure Audacity is running with mod-script-pipe.
<<< Process finished (PID=17324). (Exit code 0)
================ READY ================