[Rivet] Rivet on afs

[Andy Buckley]

Hi Kathrin,

I have copied this to the Rivet developer mailing list -- please send
queries there rather than to me.

I'm not sure about this issue -- it looks to me like the Genser build of
Rivet/YODA was made using a different build of GCC than the one
available via setupATLAS. We do not use libquadmath at all, so it is
something that has been linked in by default.

I suspect that finding a copy of libquadmath on AFS and putting its
containing directory into your LD_LIBRARY_PATH variable would solve the
problem, but there should be a standard environment setup for using LCG
builds without having to do manual tweaks like that. I've copied in the
LCG application area manager and Generator Services team, who I hope can
provide an answer. I would also like to know, so I can provide easy
instructions to use Genser's Rivet build, for non-ATLAS users.

Best wishes,
Andy


On 17/11/14 10:52, Kathrin Becker wrote:
> Dear Andy,
> 
> I'm sorry to bother you again. I tried today to switch away from the
> experimental version of rivet to the other one in afs.
> I followed your instructions in the email.
> But if I now do rivet-cmphistos I get the following error.
> [becker at pplxint9 valplots_WW]$ rivet-cmphistos
> mc12_8TeV.181416.PowhegPythia8_AU2CT10_HJ_MINLO_ggH125_WW2lep_EF_15_5.evgen.EVNT.e2177_tid01320008_00.yoda
> mc12_8TeV.161224.PowhegPythia8_AU2CT10_ggH125_WW2lep.evgen.EVNT.e2363_tid01352492_00.yoda
> 181999.HJ_MINLO_CT10nnlo_8TeV.yoda
> 181997.H_NNLO_22_11_CT10nnlo_8TeV.yoda less standaloneSetupRivet.sh
> Traceback (most recent call last):
>   File
> "/afs/cern.ch/sw/lcg/external/MCGenerators_lcgcmt67c/rivet/2.2.0/x86_64-slc6-gcc47-opt/bin/rivet-cmphistos",
> line 13, in <module>
>     import rivet, yoda, sys, os
>   File
> "/afs/cern.ch/sw/lcg/external/MCGenerators_lcgcmt67c/rivet/2.2.0/x86_64-slc6-gcc47-opt/lib/python2.7/site-packages/rivet/__init__.py",
> line 12, in <module>
>     from rivet.core import *
> ImportError: libquadmath.so.0: cannot open shared object file: No such
> file or directory
> 
> Do you have an idea what I'm doing wrong?
> Thank you for your help!
> Cheers,
> Kathrin
> 
> 
> 
> On 11/12/2014 06:55 PM, Andy Buckley wrote:
>> On 12/11/14 16:42, Kathrin Becker wrote:
>>> Dear Andy,
>>>
>>> maybe you have already gotten tons of messages about this... But just in
>>> case you haven't:
>> Actually I didn't get lots of emails about this... you're the first.
>> Yes, I was surprised too!
>>
>>> Is there a reason why the rivet on afs has been move from
>>> /afs/cern.ch/sw/lcg/experimental/rivet/ to
>>> /afs/cern.ch/sw/lcg/experimental/rivet/bak/ ?
>>> Thus, all setup scripts don't work anymore.
>>> Should we use a different rivet, that is located somewhere else?
>> Yes, that's right! That area was never meant for production use -- the
>> hint is in the "experimental" bit of the path! The version in there was
>> a pre-release version from about 2 years ago; and was subject to change
>> at any time (I'll use it again if I ever need to make a slightly public
>> pre-release copy available for testing.)
>>
>> I just added a README file to that directory explaining how to set up a
>> reliable existing AFS Rivet build, but here's the short version:
>>
>> setupATLAS
>> localSetupPython 2.7.3-x86_64-slc6-gcc47
>> source
>> /afs/cern.ch/sw/lcg/external/MCGenerators_lcgcmt67c/rivet/2.2.0/x86_64-slc6-gcc47-opt/rivetenv.sh
>>
>>
>>> PS: I only use rivet outside of Athena to do make-plots, as this
>>> sometimes doesn't work when athena is setup.
>> Hmm, that's odd. How does it go wrong, and with what release(s)?
>>
>> Andy
>>
> 


-- 
Dr Andy Buckley, Royal Society University Research Fellow
Particle Physics Expt Group, University of Glasgow / PH Dept, CERN