Error installing Delphes from Madgraph

[Siddharth]

Dear Delhphes Team,

I am facing following problem while compilation of Delphes therough Madgraph Interface (MG5 v2.2.3). I have root 6.04 on my system:

Compiling classes/DelphesTF2.cc
classes/DelphesTF2.cc: In member function ‘Int_t DelphesTF2::DefinedVariable(TString&, Int_t&)’:
classes/DelphesTF2.cc:32:12: error: ‘kVariable’ was not declared in this scope
action = kVariable;

make: * [tmp/classes/DelphesTF2.o] Error 1

Please give some solution.
Thanks.
Cheers,
Siddharth

[Pavel Demin]

There are already two tickets about the same problem: #431 and #632.

However, I can't reproduce this problem.

I tried on Linux and MacOSX with pre-built ROOT binaries and building ROOT from sources.

If you could describe the exact steps (starting from the OS and compiler versions) to reproduce this problem, when I could try to reproduce them myself.

Regards,

Pavel

[Siddharth]

Hi,

Thanks fro your reply. The relevant details are :

Operating System: Ubuntu 14.04

ROOT version 6.04

Installed ROOT from source

regards
Siddharth

[Pavel Demin]

Thanks for the information about your system.

I've just tested Delphes 3.2.0 with ROOT 6.02.05 and ROOT 6.04.00.

With ROOT 6.02.05 everything works.

With ROOT 6.04.00 I can reproduce the problem.

Here are the commands that I used:

cd /work/root/
wget http://root.cern.ch/download/root_v6.04.00.Linux-ubuntu14-x86_64-gcc4.8.tar.gz
tar -zxf root_v6.04.00.Linux-ubuntu14-x86_64-gcc4.8.tar.gz
mv root root_6.04.00
export ROOTSYS=/work/root/root_6.04.00
export PATH=$ROOTSYS/bin:$PATH
export PYTHONPATH=$ROOTSYS/lib:$PYTHONPATH
export LD_LIBRARY_PATH=$ROOTSYS/lib:$LD_LIBRARY_PATH

cd /work/delphes/
wget http://cp3.irmp.ucl.ac.be/downloads/Delphes-3.2.0.tar.gz
cd Delphes-3.2.0
make

[Pavel Demin]

Looking at the ROOT 6.04 release notes

​https://root.cern.ch/root/html604/notes/release-notes.html#tformula

I've found that a new version of the TFormula class was introduced and this version is not backward compatible with the old TFormula class.

As a workaround, I can propose to use Delphes 3.2.0 with ROOT 6.02.