To use molcas 7.4 - max 1cpu (working on parallel version) add following lines to your .bashrc file export MOLCAS=/apps/molcas74 To submit molcas job: qsub your_script Example of your_script #!/bin/ksh #$ -S /bin/ksh #$ -cwd #$ -e /dev/null #$ -o /dev/null #$ -pe smp 1 Project='ethylene72' Home=$PWD export MOLCASMEM=1800 export MOLCAS=/apps/molcas74 export PATH=/apps/bin:/apps/molcas74/bin:$PATH WorkDir=/scratch/$USER/$Project export Project WorkDir print 'Start of job:' $Project print 'Current directory:' $Home print 'Scratch directory:' $WorkDir trap 'exit' ERR rm -fr $WorkDir mkdir -p $WorkDir cd $WorkDir molcas $Home/$Project.input >$Home/$Project.output cp $Project.geo.molden $Home/$Project.geo.molden cp $Project.freq.molden $Home/$Project.freq.molden cp *.molden $Home/. cd - #rm -r $WorkDir