clpexAPI related bug on Virtual machine

[aassie]

Hello Johannes,

So I still can't install cplexAPI on my virtual machine and couldn't find how to have the glpk solver used instead. I have digged a bit in the code and found out that the adapt.R and gf.suite.R scripts have to both load the cplexAPI before checking if it is present in the installed package.

if you move the

suppressMessages(library(cplexAPI))

within the the if loop below

if( "cplexAPI" %in% rownames(installed.packages()) ){
  sybil::SYBIL_SETTINGS("SOLVER","cplexAPI"); ok <- 1
}else{
  warning("glpkAPI is used but cplexAPI is recommended because it is much faster")
  sybil::SYBIL_SETTINGS("SOLVER","glpkAPI"); ok <- 5
}

like this

if( "cplexAPI" %in% rownames(installed.packages()) ){
  suppressMessages(library(cplexAPI))
  sybil::SYBIL_SETTINGS("SOLVER","cplexAPI"); ok <- 1
}

it seems to fix the script crashing because it can't load the cplexAPI so it can't choose the solver =)

[Waschina]

Hello Adrien,

Thank you very much for pointing this out! The commit 59ea9ce should fix the issue in the same way as you suggested.
We'll also run some tests to compare models between glpk and cplex.

Thanks again!
Silvio

[Waschina]

Hello Adrien,

just as a small addition. I also struggled with the installation of cplexAPI but it worked for me using the following commands. Maybe it works for you the same way.

CPLEXDIR=/dir/to/cplex129/cplex # adjust this with the path to your cplex installation
SYSTEM=`ls -d ${CPLEXDIR}/lib/*`
LIBFORMAT=static_pic
CPLEXLIBDIR=${SYSTEM}/${LIBFORMAT}

R CMD INSTALL --configure-args=" \
PKG_CFLAGS='-m64 -fPIC' \
PKG_CPPFLAGS='-I${CPLEXDIR}/include' \
PKG_LIBS='-L${CPLEXLIBDIR} -lcplex -lm -pthread -ldl'" \
cplexAPI_1.3.6.tar.gz