[R-pkg-devel] Diagnosing error on CRAN's old R, old Windows

[Ben Bond-Lamberty]

Dear list,

My recent package was accepted and posted by CRAN, but the check
results (https://cran.r-project.org/web/checks/check_results_luzlogr.html)
show an error for flavor 'r-oldrel-windows-ix86+x86_64'. Everything
else passes fine. Unfortunately the error diagnostics are not
particularly helpful, only showing that four tests failed; the only
common thread I see, maybe, is that all four tests--and no others--use
R's file.size() function.

Any suggestions on figuring out what's going on? Is this necessary to
fix? I'd rather not track down an old Windows machine and install an
old R release on it just to debug, though will if necessary.

Thanks,

Ben