Dear List, Recently installed Demeter on Ubuntu for a master's lab work at Bessy II (HZBerlin), with help from David Hughe's instructions (https://bruceravel.github.io/demeter/documents/SinglePage/demeter_nonroot.ht...). When I run Athena ("dathena" in comand line) the interface window appears but command line has output: $ dathena Trying Larch server: /home/frederik/perl5/lib/perl5/x86_64-linux-gnu-thread-multi/Demeter/share/ini/larch_server.ini Trying Larch server: larch_server -p 4966 start Can't exec "larch_server": No such file or directory at /home/frederik/perl5/lib/perl5/x86_64-linux-gnu-thread-multi/Larch.pm line 66. Later, when i try to import a data-file, column selection windows shows up as it should, but after i've chosen numerator and press OK, the whole Athena crashes. Message on terminal (sorry I know its massive...): Attribute (bkg_pre1) does not pass the type constraint because: Validation failed for 'LaxNum' with value 9997,000 at accessor Demeter::Data::bkg_pre1 (defined at /home/frederik/perl5/lib/perl5/x86_64-linux-gnu-thread-multi/Demeter/Data.pm line 258) line 7 Demeter::Data::bkg_pre1('Demeter::Data=HASH(0xd91e330)', '9997,000') called at /home/frederik/perl5/lib/perl5/x86_64-linux-gnu-thread-multi/Demeter/Data/Defaults.pm line 48 Demeter::Data::Defaults::resolve_defaults('Demeter::Data=HASH(0xd91e330)') called at /home/frederik/perl5/lib/perl5/x86_64-linux-gnu-thread-multi/Demeter/Data/Mu.pm line 290 Demeter::Data::Mu::initialize_e0('Demeter::Data=HASH(0xd91e330)') called at /home/frederik/perl5/lib/perl5/x86_64-linux-gnu-thread-multi/Demeter/Data/Mu.pm line 270 Demeter::Data::Mu::put_data('Demeter::Data=HASH(0xd91e330)') called at /home/frederik/perl5/lib/perl5/x86_64-linux-gnu-thread-multi/Demeter/Data.pm line 734 Demeter::Data::_update('Demeter::Data=HASH(0xd91e330)', 'all') called at /home/frederik/perl5/lib/perl5/x86_64-linux-gnu-thread-multi/Demeter/UI/Athena/IO.pm line 648 Demeter::UI::Athena::IO::_group('Demeter::UI::Athena=HASH(0xbcd018)', 'Demeter::UI::Athena::ColumnSelection=HASH(0xd949d08)', 'Demeter::Data=HASH(0xd91e330)', 'HASH(0xd91a8e8)', '/home/frederik/Desktop/Spectroscopy with Synchrothron Radiation/Praktikum_results/nanoXANES/Prakt_W_XANES_E_d70_1.log', '/home/frederik/Desktop/Spectroscopy with Synchrothron Radiation/Praktikum_results/nanoXANES/Prakt_W_XANES_E_d70_1.log', 0, 0) called at /home/frederik/perl5/lib/perl5/x86_64-linux-gnu-thread-multi/Demeter/UI/Athena/IO.pm line 531 Demeter::UI::Athena::IO::_data('Demeter::UI::Athena=HASH(0xbcd018)', '/home/frederik/Desktop/Spectroscopy with Synchrothron Radiation/Praktikum_results/nanoXANES/Prakt_W_XANES_E_d70_1.log', '/home/frederik/Desktop/Spectroscopy with Synchrothron Radiation/Praktikum_results/nanoXANES/Prakt_W_XANES_E_d70_1.log', 1, 0) called at /home/frederik/perl5/lib/perl5/x86_64-linux-gnu-thread-multi/Demeter/UI/Athena/IO.pm line 193 Demeter::UI::Athena::IO::Import('Demeter::UI::Athena=HASH(0xbcd018)') called at /home/frederik/perl5/lib/perl5/x86_64-linux-gnu-thread-multi/Demeter/UI/Athena.pm line 862 Demeter::UI::Athena::OnMenuClick('Wx::Frame=HASH(0x9a617f0)', 'Wx::CommandEvent=SCALAR(0xc3a9480)', 'Demeter::UI::Athena=HASH(0xbcd018)') called at /home/frederik/perl5/lib/perl5/x86_64-linux-gnu-thread-multi/Demeter/UI/Athena.pm line 784 Demeter::UI::Athena::__ANON__('Wx::Frame=HASH(0x9a617f0)', 'Wx::CommandEvent=SCALAR(0xc3a9480)') called at /home/frederik/perl5/bin/dathena line 31 eval {...} at /home/frederik/perl5/bin/dathena line 31 So, where is the problem? Can anyone helo with this? Made sure larch was installed through sudo apt-get install, but all stays the same. Thanks for any help! Frederik David Hughes' guide to Demeter Installation on Ubuntu ...https://bruceravel.github.io/demeter/documents/SinglePage/demeter_nonroot.ht... bruceravel.github.io David Hughes' guide to Demeter Installation on Ubuntu¶ These instructions cover a non-root manual build of Bruce Ravel's Demeter package under Ubuntu 12.04. Found out that Athena