This is a bug in R 4.0.0 - R 4.0.4 affecting packages using LazyData. Two possible workarounds:
- Manually run tools::resaveRdaFiles() on your data directory before building the package. - Use a current development version of R (4.0.4-patched >= r80069 or R-devel >= r79573) Best regards, Sebastian Meyer PS: This is a duplicate of a recent discussion on this list, see https://stat.ethz.ch/pipermail/r-package-devel/2021q1/006643.html Am 11.03.21 um 21:57 schrieb Jonathan Callahan: > I am building a package using R 4.0.4 on OS X 10.15.7. > > In a terminal I type: > > R CMD build --resave-data AirSensor > > Then, I check with: > > R CMD check --as-cran AirSensor_1.0.8.tar.gz > > Everything is fine until I see: > > > * checking data for ASCII and uncompressed saves ... WARNING > > > > Note: significantly better compression could be obtained > > by using R CMD build --resave-data > > old_size new_size compress > > example_pas.rda 1.6Mb 1.1Mb xz > > example_pas_raw.rda 114Kb 86Kb xz > > example_pat.rda 965Kb 444Kb xz > > example_pat_failure_A.rda 527Kb 259Kb xz > > example_pat_failure_B.rda 411Kb 198Kb xz > > example_sensor_scaqmd.rda 108Kb 76Kb xz > > I get the same WARNING if I submit to win-builder.R-project.org. > > I've built many packages in the past and am currently stumped as to what > might be happening. > ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel