NAMD running problem

From: Jason Lee (
Date: Tue Sep 27 2005 - 15:02:27 CDT

Dear all,

I am trying to compile NAMD and run it on MPICH on Mac OSX. Finally I
compile NAMD2.5 and MPICH1.2.6 by using IBM XLC compiler. However I
encounter following problem when run it. Could anyone give me some hints?
The only message is from the log file.

"Could not find enough machines for architecture freebsd_ppc"

My script file is as follows.

### Begin embedded Grid Engine arguments
# (name the job)
set NAMD_SCRIPT = $1
#$ -N sstz2.6mx
# (ask for our newly created PE and a range of 3-5 CPUs)
#$ -hard -pe mpich 2
# (assume current working directory for paths)
#$ -cwd
# (set group variable)
### End embedded Grid Engine commmands
echo "I have $NSLOTS slots to run on!"
/Users/j0l6571/bin/mpich-1.2.6/bin/mpirun -np $NSLOTS -machinefile
$TMPDIR/machines /Users/j0l6571/bin/namd/namd2.6/MacOSX-PPC-xlC/namd2
$NAMD_SCRIPT > results.log

And I also try to use the following command.

/Users/l0l6571/bin/mpich-1.2.6/bin/mpirun -np $NSLOTS -machinefile
$TMPDIR/machines /Users/l0l6571/bin/namd/namd2.6/MacOSX-PPC-xlC/namd2

But the above command give me such error.

Info: NAMD 2.6b1 for MacOSX-PPC
Info: Please visit
Info: and send feedback or bug reports to
Info: Please cite Kale et al., J. Comp. Phys. 151:283-312 (1999)
Info: in all publications reporting results obtained with NAMD.
Info: Based on Charm++/Converse 50900 for mpi-ppc-darwin-xlc
Info: Built Wed Sep 7 15:45:16 CDT 2005 by l0l6571 on
Info: Sending usage information to NAMD developers via UDP. Sent data is:
Info: 1 NAMD 2.6b1 MacOSX-PPC 1 l0l6571
Info: Running on 1 processors.
Info: 0 kB of memory in use.
p0_22282: p4_error: interrupt SIGSEGV: 11

Appreciate it.

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