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It looks like this is a bug https://github.com/ros2/rosbag2/issues/630 Introduced by a recent change.

According to this answer on Stack Overflow, you might be able to workaround this by installing patch from GnuWin32 and adding it to your PATH environment variable.

For modifying PATH to include patch, these instructions might be helpful.

you can do this by clicking the Windows icon, typing “Environment Variables”, then clicking on “Edit the system environment variables”. In the resulting dialog, click “Environment Variables”, the click “Path” on the bottom pane, then click “Edit” and add the path