Yambo Community Forum

Posted: **Wed Dec 23, 2015 6:56 am**

Hi Everyone

I am trying to run yambo in parallel.

The yambo code were compiled with mpif90, and the configure report shows that the MPI option was enable:

Code: Select all

[X] Double precision
[X] Redundant compilation  
[X] MPI 
[ ] OpenMP 
[X] PW (5.0) support
[ ] ETSF I/O support
[ ] SCALAPACK
[XXX] NETCDF/HDF5/Large Files 
[XX ] Built-in BLAS/LAPACK/LOCAL

[ CPP ] icc -E -ansi  
[  C  ] icc -O3 -D_C_US -D_FORTRAN_US
[MPICC] /opt/openmpi-1.6.5/intel/bin/mpicc -O3 -D_C_US -D_FORTRAN_US
[ F90 ] ifort -O2   
[MPIF ] /opt/openmpi-1.6.5/intel/bin/mpif90 -O2   
[ F77 ] ifort -O2
[Cmain] -nofor_main
[NoOpt] -assume bscc -O0 -xHost

However, when I run the yambo with mpirun, it fails with the errors:
mpirun was unable to launch the specified application as it could not find an executable:

Executable: yambo
Node: compute-0-6

while attempting to start process rank 1.

this is the command I used to execute the yambo:
/opt/openmpi-1.6.5/intel/bin/mpirun -machinefile host.list -np 48 yambo

the yambo.in file is already in the directory

thanks

Posted: **Wed Dec 23, 2015 8:18 am**

Dear Eric,
it looks that the executable (yambo) it is not in your $PATH variable.
Either you export the path of yambo in the PATH variable,
export PATH=$PATH:/path_to_yambo/
this is in bash and you can write it in your .bashrc.
either you indicated the full path when launching the job:
/opt/openmpi-1.6.5/intel/bin/mpirun -machinefile host.list -np 48 /path_to_yambo/yambo

For this kind of error you can also ask to your system administrator.

Best,
Daniele

Posted: **Wed Dec 23, 2015 9:24 pm**

Dear Daniele

thanks

The path for yambo is already set in the bash_profile file:
which yambo
~/soft/yambo/yambo_12_15/bin/yambo

But the error remains.

I am not sure whether it is due to the wrong config option.

But the yambo code was compilation successfully, and it run well without the parallel computation.

Posted: **Thu Dec 24, 2015 8:50 am**

Dear Eric,
this problem is not related to yambo itself:

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

the yambo executable cannot be found, you should ask to your machine administrator.
Best,
Daniele

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