Hello Dave, The -f hostfile option works fine with newer MPICH versions. Your version of the MPICH is very old. Please try the Ubuntu packages at http://www.mpich.org/downloads/. Thanks, --Halim www.mcs.anl.gov/~aamer On 11/23/15 12:30 PM, dave wrote:

I failed to include the mpich2 version info in previous thread:

==================== dave@ubuntu-desk:/home/mpiuser/cloud$ mpich2version MPICH2 Version: 1.4.1 MPICH2 Release date: Wed Aug 24 14:40:04 CDT 2011 MPICH2 Device: ch3:nemesis MPICH2 configure: --build=i686-linux-gnu --prefix=/usr --includedir=${prefix}/include --mandir=${prefix}/share/man --infodir=${prefix}/share/info --sysconfdir=/etc --localstatedir=/var --libexecdir=${prefix}/lib/mpich2 --srcdir=. --disable-maintainer-mode --disable-dependency-tracking --disable-silent-rules --enable-shared --prefix=/usr --enable-fc --disable-rpath --sysconfdir=/etc/mpich2 --includedir=/usr/include/mpich2 --docdir=/usr/share/doc/mpich2 --with-hwloc-prefix=system --enable-checkpointing --with-hydra-ckpointlib=blcr MPICH2 CC: gcc -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -Werror=format-security -Wall -O2 MPICH2 CXX: c++ -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -Werror=format-security -Wall -O2 MPICH2 F77: gfortran -g -O2 -O2 MPICH2 FC: gfortran -O2 dave@ubuntu-desk:/home/mpiuser/cloud$ ==========================================

On 11/23/2015 11:27 AM, dave wrote:

...

Hello Group,

Is the following statement option -F still correct?

dave@ubuntu-desk:/home/mpiuser/cloud$ sudo mpiexec -f hosts.cfg -n 4 ./hello [sudo] password for dave: --------------------------------------------------------------------------

mpiexec was unable to launch the specified application as it could not find an executable:

Executable: -f Node: ubuntu-desk

while attempting to start process rank 0. ==================================

I tried it another way too with same result:

dave@ubuntu-desk:/home/mpiuser/cloud$ sudo mpiexec -n 8 machinefile ./hello --------------------------------------------------------------------------

mpiexec noticed that the job aborted, but has no info as to the process that caused that situation. --------------------------------------------------------------------------

Machine file, two lines, one for each machine in the network. Each with SSH and mpich2:

ubuntu-desk-2:2 # ubuntu-desk #

--------------------------------------------------------------------------

Any ideas about mpiexec statement or anything else to get these machines talking?

Dave

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