If anyone is interested in helping out, this is a good time to test R 4.1.1 before it is released. Now is the time to look for and report - regressions (things that worked in 4.1.0, but not in 4.1.1) - regressions in 4.1.0 not fixed by 4.1.1 - bugs in new features in 4.1.0 not fixed by 4.1.1 For more tips and details, please see https://developer.r-project.org/Blog/public/2021/04/28/r-can-use-your-help-testing-r-before-release Thanks Tomas