Invalidargumentexception: Message: Invalid Argument: User Data Directory Is Already in Use Error Using --User-Data-Dir to Start Chrome Using Selenium

selenium.common.exceptions.InvalidArgumentException: Message: invalid argument: user data directory is already in use error with real Chrome Browser

This error message...

selenium.common.exceptions.InvalidArgumentException: Message: invalid argument: user data directory is already in use, please specify a unique value for --user-data-dir argument, or don't use --user-data-dir

...implies that the --user-data-dir is already in use.

Your main issue is you have already an open Google Chrome browser session opened for your manual browsing.

There is no such error in your code block. However it seems you are executing program as an Administrator. But,

A common cause for Chrome to crash during startup is running Chrome as root user (administrator) on Linux. While it is possible to work around this issue by passing --no-sandbox flag when creating your WebDriver session, such a configuration is unsupported and highly discouraged. You need to configure your environment to run Chrome as a regular user instead.

Solution

Before you execute your test as an user e.g. Administrator, ensure that you don't have any open Chrome browser windows using the same user i.e. Administrator.

Selenium ChromeDriver: unable to set user-data-dir

you need to remove /Default/ because its not valid directory for --user-data-dir it is for --profile-directory

options.add_argument('--profile-directory=Default')
# or
options.add_argument('--profile-directory=other_profile')

Related Topics