[Darshan-users] darshan doesn't generate the login

[nicola varini]

Hi, I am new to darshan. Sorry if my question is trivial but I've tried 
to search a bit through the mailing list archive and I did not find much 
help.
I am try to understand how to use darshan and I've build the runtime with
./configure --with-mem-align=8 
--with-log-path=/scratch/director100/nicola/darshan-2.2.8 CC=mpicc 
--with-jobid-env=PBS_JOBID 
--prefix=/scratch/director100/nicola/darshan-2.2.8
and the util with
./configure --prefix=/scratch/director100/nicola/darshan-2.2.8
then I'd like to profile LAMMPS IO with darshan. Here I use openmpi 
1.6.5, so I did
export 
LD_PRELOAD=/scratch/director100/nicola/darshan-2.2.8/lib/libdarshan.so

then I make lammps
and I tried to execute a simple example with

mpirun -np 12 
/scratch/director100/nicola/lammps_pistolare/src/lmp_fornax < in.friction

However no darshan.gz is generated.
Any idea why?

Thanks,

Nicola