Hi Robert, Apologies for the delayed response. I'm unable to reproduce this on a CentOS 6 machine so far. Can you run ldd against your hello world binaries to double check the linkage? The MPI_UNWEIGHTED symbol should be resolved in the libmpi.so library by the inter-library dependency. Ken On 08/02/2016 02:00 PM, Robert Baurle wrote:

Sorry, I should have also stated that /opt/mpich is a symbolic link to /opt/mpich_gfc. I define /opt/mpich to be a symbolic link to either:

/opt/mpich_gfc

or

/opt/mpich_lahey

depending on which Fortran90 compiler I want to use. I currently have /opt/mpich symbolically linked to /opt/mpich_gfc, and /opt/mpich is defined in my paths as shown below

hyp22 rbaurle > echo $LD_LIBRARY_PATH /usr/lib64/atlas:/opt/tecplotex/bin:/opt/mpich/lib:/opt/lahey-64/lib64:/usr/local/lib

hyp22 rbaurle > echo $PATH /home/rbaurle/bin:/usr/lib64/qt-3.3/bin:/usr/local/bin:/usr/bin:/bin:/sbin:/opt/lahey-64/bin:/opt/tecplot/bin:/opt/gridpro/bin:/opt/mpich/bin:.:/home/rbaurle/Vulcan/vulcan.bzr/Vulcan/Scripts

Rob

On 08/02/2016 02:48 PM, Halim Amer wrote:

...

you are probably linking to the wrong MPICH. You installed MPICH to /opt/mpich_gfc but the error occurs for MPICH installed at /opt/mpich.

Do you have /opt/mpich in LD_LIBRARY_PATH? If that's the case, then you should remove it or place /opt/mpich_gfc before it.

--Halim

www.mcs.anl.gov/~aamer

On 8/2/16 11:33 AM, Robert Baurle wrote:

...

Hello,

I have installed MPICH 3.2 on a CENTOS 6 machine with the following configuration options:

setenv CC /usr/bin/gcc setenv FC /usr/bin/gfortran setenv CXX /usr/bin/c++ setenv INS_DIR /opt/mpich_gfc

../mpich-3.2/configure --prefix=$INS_DIR --with-device=ch3:nemesis |& tee configure.log

make --jobs 4 |& tee make.log

make install

and the installation appeared to have completed without error (see the attached configure.log and make.log files). However, when I attempt to run a simple hello_world FORTRAN 90 program, I get the following error:

hyp22 rbaurle 2293> mpirun -n 3 a.out < hello.inp a.out: symbol lookup error: /opt/mpich/lib/libmpifort.so.12: undefined symbol: MPI_UNWEIGHTED

If I repeat the installation, but change the Fortran90 compiler from GFORTRAN to the Lahey 8.1 compiler, i.e.:

setenv FC /opt/lahey-64/bin/lf95

then the hello_world program runs just fine. Do you have any idea what might be going on here? I should also mention that the same error appears if I install MPICH 3.1.3.

Thanks,

Rob

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