Hi, I've just opened an issue at dtplyr upstream[1] where DebCI has uncovered an issue with latest dplyr[2]. Kind regards Andreas. [1] https://github.com/tidyverse/dtplyr/issues/419 [2] https://ci.debian.net/data/autopkgtest/testing/amd64/r/r-cran-dtplyr/31650957/log.gz -- http://fam-tille.de