there must be at least two ranks per node


Click here for full thread
Forum Vet
Jim
Plesase send the output of the following commands

which mpirun
ldd $NWCHEM_TOP/bin/$NWCHEM_TARGET/nwchem
mpif90 -show

PS We do have precompiled packages for Ubuntu 18.04
https://github.com/nwchemgit/nwchem/releases/download/6.8.1-release/nwchem_6.8.1+133+gitge...
https://github.com/nwchemgit/nwchem/releases/download/6.8.1-release/nwchem-data_6.8.1+133+...

Instructions for installing them:
curl -O https://github.com/nwchemgit/nwchem/releases/download/6.8.1-release/nwchem-data_6.8.1+133+gitge032219-2_all.ubuntu_bionic.deb
curl -O https://github.com/nwchemgit/nwchem/releases/download/6.8.1-release/nwchem-data_6.8.1+133+gitge032219-2_all.ubuntu_bionic.deb
sudo apt get libscalapack-mpi-dev libopenblas-dev 
sudo dpkg -i nwchem-*6.8.1*deb