Found the following significant warnings:
  Warning: SystemRequirements: invalid C++ specification ‘C++’
See ‘/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/AFR.Rcheck/00install.out’ for details.
Found the following significant warnings:
  Warning: SystemRequirements: invalid C++ specification ‘C++’
See ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/AFR.Rcheck/00install.out’ for details.
Found the following significant warnings:
  Warning: SystemRequirements: invalid C++ specification ‘C++’
See ‘/data/gannet/ripley/R/packages/tests-clang/AFR.Rcheck/00install.out’ for details.
Namespaces in Imports field not imported from:
  ‘mFilter’ ‘regclass’ ‘writexl’
  All declared Imports should be used.
Found the following significant warnings:
  Warning: SystemRequirements: invalid C++ specification ‘C++’
See ‘/data/gannet/ripley/R/packages/tests-devel/AFR.Rcheck/00install.out’ for details.
Namespaces in Imports field not imported from:
  ‘mFilter’ ‘regclass’ ‘writexl’
  All declared Imports should be used.
Found the following significant warnings:
  Warning: SystemRequirements: invalid C++ specification 'C++'
See 'd:/Rcompile/CRANpkg/local/4.6/AFR.Rcheck/00install.out' for details.
Found the following significant warnings:
  Warning: SystemRequirements: invalid C++ specification ‘C++’
See ‘/home/hornik/tmp/R.check/r-patched-gcc/Work/PKGS/AFR.Rcheck/00install.out’ for details.