[Rivet] rivet and problems with python lib

[Andy Buckley]

Zenonas Zenonos wrote:
> Hello Andy
> 
> thanks for looking at this.
> Previously, I was running with python 2.5.4p2, Rivet 
> 1.2.1, slc4_amd64_gcc34, AGILe-1.1.4 and it was working fine.
> Now, I moved to py 2.6.2,  rivet 
> 1.4.0, x86_64-slc5-gcc43-opt, AGILe-1.2.1 and I'm having this python 
> problem.
> 
> The result of doing "locate libpython2.6.so.1.0" interactively is good 
> /usr/lib64/libpython2.6.so.1.0
> but empty when running with bsub. Which path must be normally taken when 
> running?
> In the other hand, I saw that  libpython2.4.so.1.0 exist when running 
> with bsub. What might be the solution to that?

Ok, your workstation has Python 2.6 installed as part of the OS, so your 
builds of Rivet & AGILe have used that and will require that there is a 
corresponding library in the library lookup path when running. From your 
bsub check, the batch system is not the same OS, and does not have a 
system copy of Python 2.6.2. So unless you find a 64 bit 
libpython2.6.so.1.0 on the batch system, it's not going to run successfully.

> How can I point to libpython2.6.so.1.0 correctly when running with bsub?

You'll have to find one first! There might be a suitable library on AFS 
in the Python installations under /afs/cern.ch/sw/lcg/... if you can 
find one, then in your batch script add a line to add its containing 
directory to the runtime loader path, e.g. "export 
LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/afs/cern.ch/sw/lcg/python/2.6.2/x86_64-slc5-gcc43-opt/lib"
(I just made that path up... you should check for yourself!)

Hope that helps,
Andy

-- 
Dr Andy Buckley
SUPA Advanced Research Fellow
Particle Physics Experiment Group, University of Edinburgh

The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.