* using log directory 'd:/Rcompile/CRANpkg/local/4.0gcc8/ROI.plugin.cplex.Rcheck' * using R version 4.0.0 RC (2020-04-17 r78247) * using platform: x86_64-w64-mingw32 (64-bit) * using session charset: ISO8859-1 * checking for file 'ROI.plugin.cplex/DESCRIPTION' ... OK * this is package 'ROI.plugin.cplex' version '0.3-0' * checking package namespace information ... OK * checking package dependencies ... ERROR Package required but not available: 'Rcplex' See section 'The DESCRIPTION file' in the 'Writing R Extensions' manual. * DONE Status: 1 ERROR