CHARMm and MPICH

[Greg Lakatos <greg - at - fjohn.Stanford.EDU>]

Hello Everyone.
 Recently I've been trying to compile a parallelized CHARMm c27b2
 executable with MPICH 1.2.0 on a two-machine RedHat 7 cluster and have
 run into some difficulty.  In particular when compiling charmm the
 command:
      ./install.com gnu large mpich
 runs to completion, produces an executable, but never asks for the path
 to the mpich libraries.  Moreover when charmm is run with the command:
 charmm -p4wd . -p4pg hosts < inputfile.inp > outfile.out
 where hosts contains:
 head 0 /ptemp/charmm
 head 1 /ptemp/charmm
 n01  1 /ptemp/charmm
 n01  1 /ptemp/charmm
 charmm issues an error over the p4wd and p4pg switches.  When run without
 these switches, charmm runs but only uses a single CPU.  Any help
 resolving these issues would be greatly appreciated.
 - Greg