shutil.Error when installing update

[aecreations]

I'm following the example application in the tufup-example repo and am stuck on step 3 of the client-side instructions. When I run the example app my_app, the updated version, which I've numbered as 1.0.1, is detected from the repo which I'm running on localhost as per the instructions, and I accept the prompt to install the update. But the update fails with this error:

DEBUG:tufup.utils.platform_specific:Moving content of /var/folders/w7/9_tl8p197pv8yv3hffvr89n40000gn/T/tufup to /Users/alex/Applications/my_app.
Traceback (most recent call last):
  File "main.py", line 12, in <module>
  File "myapp/__init__.py", line 85, in main
  File "myapp/__init__.py", line 45, in update
  File "tufup/client.py", line 143, in download_and_apply_update
  File "tufup/client.py", line 333, in _apply_updates
  File "tufup/utils/platform_specific.py", line 58, in install_update
  File "tufup/utils/platform_specific.py", line 265, in _install_update_mac
  File "shutil.py", line 654, in copytree
  File "shutil.py", line 608, in _copytree
shutil.Error: [('/var/folders/w7/9_tl8p197pv8yv3hffvr89n40000gn/T/tufup/main', '/Users/alex/Applications/my_app/main', "[Errno 17] File exists: '/Users/alex/Applications/my_app/main'")]
[PYI-5555:ERROR] Failed to execute script 'main' due to unhandled exception!

Was there a step that I missed, or permissions that I need to set?

Using Python 3.14.2 on macOS 26.3.1 (a).

[dennisvang]

Hi @aecreations ,

Looks like there is already a file with that name:

... [Errno 17] File exists: '/Users/alex/Applications/my_app/main'

This could e.g. be a leftover from an earlier attempt.
Did you try removing the content of /Users/alex/Applications/my_app/?