Software⏱️ 3 min read📅 2026-06-19

How to Fix: How to fix Emacs client *ERROR*: Arithmetic error

Emacs client error fix for GNU Emacs 23.1.1

Quick Answer: Try using the -t flag to force terminal mode when running emacsclient.

📋 Table of Contents

  1. 💡 Why You Are Getting This Error
  2. ✅ Best Solutions to Fix It
  3. 💡 Conclusion

GNU Emacs 23.1.1 is experiencing an issue with the *ERROR*: Arithmetic error when using emacsclient after starting Emacs in daemon mode.

This problem can be frustrating for users who rely on the emacsclient program for efficient text editing and processing.

💡 Why You Are Getting This Error

  • The primary cause of this issue lies in the way Emacs handles its daemon mode. When Emacs is started with the --daemon flag, it creates a separate process that runs in the background, which can lead to issues when using emacsclient.
  • An alternative possible reason for this problem could be related to the way Emacs interacts with the shell, possibly due to differences in how the two handle input/output operations.

✅ Best Solutions to Fix It

Fixing the issue by modifying Emacs's daemon mode settings

  1. Step 1: To resolve this issue, you can try setting the --daemon flag to --no-daemon when starting Emacs. This will allow emacsclient to communicate with the Emacs process without issues.
  2. Step 2: Alternatively, you can also try using the --batch flag instead of --daemon, as it provides a similar functionality but does not create a separate process in the background.
  3. Step 3: It is recommended to consult the Emacs documentation for more information on how to configure and use its daemon mode.

Workaround by forcing terminal mode when running emacsclient

  1. Step 1: To work around this issue, you can try using the -t flag when running emacsclient. This will force the program to run in terminal mode, which may help prevent the arithmetic error.
  2. Step 2: This workaround may not be ideal for all users, but it can provide a temporary solution until the underlying issue is resolved.

💡 Conclusion

In conclusion, resolving the *ERROR*: Arithmetic error when using emacsclient after starting Emacs in daemon mode requires modifying Emacs's daemon mode settings or using a workaround by forcing terminal mode. By following these steps and consulting the Emacs documentation, users can resolve this issue and enjoy efficient text editing and processing.

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