* using log directory 'd:/Rcompile/CRANpkg/local/3.6/bifurcatingr.Rcheck'
* using R version 3.6.3 (2020-02-29)
* using platform: x86_64-w64-mingw32 (64-bit)
* using session charset: ISO8859-1
* checking for file 'bifurcatingr/DESCRIPTION' ... OK
* this is package 'bifurcatingr' version '1.0.0'
* package encoding: UTF-8
* checking package namespace information ... OK
* checking package dependencies ... ERROR
Package required and available but unsuitable version: 'graphics'

See section 'The DESCRIPTION file' in the 'Writing R Extensions'
manual.
* DONE
Status: 1 ERROR