How to run multiple instances of Writer simultaneously?

Jens Tröger jens.troeger at
Thu Oct 19 06:40:57 UTC 2017

Thank you Tor for the clarification.

What I want to achieve is to use the Python UNO bridge to access multiple Writer documents at the same time.

If that can be achieved by running a single LO process (soffice.bin) then that works for me: 
  - How does that approach scale when I open many Writers? (See this post re performance and scaling: )
  - Should I keep the LO process alive over long periods of time and then open/close Writer documents as needed? (See this post re the Office Server mode: )

If I need to spawn processes with separate “user installation” directories, are you talking about the -env:UserInstallation command line argument?

Thank you!

> On Oct 19, 2017, at 16:31, Tor Lillqvist <tml at> wrote:
> You are using confusing terminology. "Spawn" is usually used in a software context to mean starting a new process running another program, what is on POSIX systems done using the fork() and exec() family of system calls, and on Windows using CreateProcess(). On the other hand, "Writer" is not a program by itself but (as you say) just one kind of document window that the real LibreOffice process (soffice.bin) displays, and a single soffice.bin process can have any number of Writer, Calc, Impress etc document windows open simultaneously.
> I.e., are you asking how to spawn multiple soffice.bin processes, or how to open multiple Writer documents, at the same time?
> For the first case, you need to spawn the processes with separate "user installation" directories. For the second case, that should be what normally happens.
> --tml

Jens Tröger

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