Found the following significant warnings:
  Warning: working directory was changed to ‘/data/gannet/ripley/R/packages/tests-clang/oceanmap.Rcheck/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/data/gannet/ripley/R/packages/tests-clang/oceanmap.Rcheck/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/data/gannet/ripley/R/packages/tests-clang/oceanmap.Rcheck/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/data/gannet/ripley/R/packages/tests-clang/oceanmap.Rcheck/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/data/gannet/ripley/R/packages/tests-clang/oceanmap.Rcheck/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/data/gannet/ripley/R/packages/tests-clang/oceanmap.Rcheck/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/data/gannet/ripley/R/packages/tests-clang/oceanmap.Rcheck/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/data/gannet/ripley/R/packages/tests-clang/oceanmap.Rcheck/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/data/gannet/ripley/R/packages/tests-clang/oceanmap.Rcheck/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/data/gannet/ripley/R/packages/tests-clang/oceanmap.Rcheck/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/data/gannet/ripley/R/packages/tests-clang/oceanmap.Rcheck/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/data/gannet/ripley/R/packages/tests-clang/oceanmap.Rcheck/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/data/gannet/ripley/R/packages/tests-clang/oceanmap.Rcheck/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/data/gannet/ripley/R/packages/tests-clang/oceanmap.Rcheck/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/data/gannet/ripley/R/packages/tests-clang/oceanmap.Rcheck/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/data/gannet/ripley/R/packages/tests-clang/oceanmap.Rcheck/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/data/gannet/ripley/R/packages/tests-clang/oceanmap.Rcheck/oceanmap/test_files’, resetting