Hello Experts, I am using Ubuntu 12.04.5 LTS, MG5_aMC_v2_4_2 and LHAPDF-6.1.5. $ lhapdf-config --prefix /home/bajarang I have set the LHAPDFSYS in my ~/.bashrc export LHAPDFSYS=$HOME export PATH=${LHAPDFSYS}/bin:${PATH} export LD_LIBRARY_PATH=${LHAPDFSYS}/lib:${LD_LIBRARY_PATH} All the pdfs are in : /home/bajarang/share/LHAPDF/CT10 Also boost version is BOOST_VERSION 104700 I am generating events for p p > W+ process. with following changes in the run_card.dat lhapdf = pdlabel ! PDF set 10800 = lhaid ! if pdlabel=lhapdf, this is the lhapdf number I changed the input/mg5_configuration.txt as : lhapdf = /home/bajarang/bin/lhapdf-config I get a huge error, some of the last few lines I am pasting below : /home/bajarang/packages/LHAPDF/LHAPDF-6.1.5/src/yamlcpp/conversion.cpp:57: undefined reference to `std::basic_string, std::allocator >::~basic_string()' /home/bajarang/packages/LHAPDF/LHAPDF-6.1.5/src/yamlcpp/conversion.cpp:57: undefined reference to `std::basic_string, std::allocator >::~basic_string()' /home/bajarang/packages/LHAPDF/LHAPDF-6.1.5/src/yamlcpp/conversion.cpp:64: undefined reference to `__cxa_guard_abort' ../lib//libLHAPDF.a(liblhapdf_yaml_cpp_la-conversion.o): In function `std::basic_string, std::allocator >::_Rep::_M_dispose(std::allocator const&)': /usr/include/c++/4.6/bits/basic_string.h:244: undefined reference to `std::basic_string, std::allocator >::_Rep::_M_destroy(std::allocator const&)' ../lib//libLHAPDF.a(liblhapdf_yaml_cpp_la-conversion.o): In function `operator==, std::allocator >': /usr/include/c++/4.6/bits/basic_string.h:2462: undefined reference to `std::basic_string, std::allocator >::compare(char const*) const' /usr/include/c++/4.6/bits/basic_string.h:2462: undefined reference to `std::basic_string, std::allocator >::compare(char const*) const' /usr/include/c++/4.6/bits/basic_string.h:2462: undefined reference to `std::basic_string, std::allocator >::compare(char const*) const' /usr/include/c++/4.6/bits/basic_string.h:2462: undefined reference to `std::basic_string, std::allocator >::compare(char const*) const' collect2: ld returned 1 exit status make: *** [../bin/internal/combine_events] Error 1 What am I doing wrong here? Please help. Thanks in advance.

When	Who	Action	New State
2017-06-19	Olivier Mattelaer	Answer	Answered
2017-06-19	Bajarang	Reopen	Open
2017-06-22	Olivier Mattelaer	Answer	Answered

MadGraph5_aMC@NLO

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