This is an update to CRAN version 1.3.1 which installed with no errors, warnings, or notes (2020-01-13) on all platforms.
Recently it was brought to my attention (by Kurt Hornik Kurt.Hornik@r-project.org) that the package was generating errors on R-devel (>r77865) running on several Linux platforms.
The errors were identified as likely due to the new default behavior for option stringsAsFactors = FALSE in functions data.frame() and read.table().
Reason for revised submission
R-devel(>r77865) running on several Linux platforms.stringsAsFactors = FALSEin functionsdata.frame()andread.table().