TauREx Troubles

We’re genuinely sorry…

With all evolving codes, there will be bugs an kinks… please report them should you find issues. We are working on a bug report system. In the meantime, please report bugs as issues on the GitHub repository or alternative email ingo@star.ucl.ac.uk. Thank you.

MPI4PY, PYMULTINEST, etc

If you run TauREx and you get the warning message:

WARNING - MPI disabled

your MPI4PY python library is either not installed properly or you forgot to run TauREx with mpirun:

mpirun -np [NCORES] python taurex.py -p [PARAMETER FILE] --plot

where [NCORES] is the number of cores you want to run it on.

If you see the following:

WARNING - MultiNest library is not loaded. MultiNest functionality will be disabled
WARNING - PolyChord library is not loaded. PolyChord functionality will be disabled

your MultiNest or PolyChord libraries are not found and PYMULTINEST fails. Try import them manually in a python shell

python
$ import pymultinest
$ import PyPolyChord

If that does not work then make sure your PATH variables are set correctly

export LD_LIBRARY_PATH=[PATH_TO_MULTINEST_FOLDER]/lib:$LD_LIBRARY_PATH
export LD_LIBRARY_PATH=[PATH_TO_POLYCHORD_FOLDER]/lib:$LD_LIBRARY_PATH

Test script

If you do not want to run TauREx to debug these issues, there is a minimal python script below that imports these libraries in very much the same way TauREx does.

# loading libraries
import sys
import os


#trying to initiate MPI parallelisation
try:
    from mpi4py import MPI
    MPIrank = MPI.COMM_WORLD.Get_rank()
    MPIsize = MPI.COMM_WORLD.Get_size()
    MPIimport = True
except ImportError:
    MPIimport = False

# checking for multinest library
try:
    import pymultinest
    multinest_import = True
except:
    multinest_import = False


if MPIimport:
    print('MPI imported')
else:
    print('no MPI')

if multinest_import:
    print('imported pymultinest, all is well')
else:
    print('not imported pymultinest')