* installing *source* package ‘Rcplex’ ...
** package ‘Rcplex’ successfully unpacked and MD5 sums checked
** using staged installation
checking for cplex... no
Trying to use . as CPLEX installation location
configure: error: CPLEX include directory ./include does not exist
ERROR: configuration failed for package ‘Rcplex’
* removing ‘/Volumes/Builds/packages/big-sur-x86_64/results/4.4/Rcplex.Rcheck/Rcplex’