I corrected the existing convert file to work correctly for mpich and created a new one for openmpi.
Use convert to split parallel output in several files using openmpi, e.g.:
mpirun -n 4 -tag-output ./src/fortran/laplace_equation_Fortran >&out.txt
~/software/opencmiss/opencmiss/src/iron/utils/convert_openmpi out.txt
I corrected the existing convert file to work correctly for mpich and created a new one for openmpi.
Use convert to split parallel output in several files using openmpi, e.g.: mpirun -n 4 -tag-output ./src/fortran/laplace_equation_Fortran >&out.txt ~/software/opencmiss/opencmiss/src/iron/utils/convert_openmpi out.txt
which generates out.txt.0 etc. For mpich:
mpirun -n 4 -l ./src/fortran/laplace_equation_Fortran >&out.txt ~/software/opencmiss/opencmiss/src/iron/utils/convert_openmpi out.txt