Dear Bruce or colleagues, Below is the error written in the log file after importing a saved (D)Artemis project. I cannot save an Artemis project and open it again. Just have to start (again) from the beginning. As stated previously, the program just fails to launch. Thanks in advance, Raimundo ------------- Attribute (initial) does not pass the type constraint because: Validation failed for 'Str' with value undef at constructor Demeter::GDS::new (defined at C:/strawberry/perl/site/lib/Demeter/GDS.pm line 189) line 185 Demeter::GDS::new('Demeter::GDS', 'gds', 'guess', 'expandsto', '', 'mark', 0, 'group', 'lxjcm', 'stored', '', 'error', 0, 'highlighted', 0, 'Use', 1, 'trouble', '', 'mathexp', 1.00000, ...) called at C:/strawberry/perl/site/lib/Demeter/Fit.pm line 1410 Demeter::Fit::__ANON__('Demeter::Fit=HASH(0xc46c914)', 'folder', 'C:\Users\Rai\AppData\Roaming\demeter\stash\_dem_rhysjijw\fits...', 'regenerate', 0) called at C:/strawberry/perl/site/lib/Moose/Meta/Method/Overridden.pm line 38 Demeter::Fit::deserialize('Demeter::Fit=HASH(0xc46c914)', 'folder', 'C:\Users\Rai\AppData\Roaming\demeter\stash\_dem_rhysjijw\fits...', 'regenerate', 0) called at C:/strawberry/perl/site/lib/Demeter/UI/Artemis/Project.pm line 359 Demeter::UI::Artemis::Project::read_project('HASH(0xa7b54d4)') called at C:/strawberry/perl/site/lib/Demeter/UI/Artemis.pm line 833 Demeter::UI::Artemis::OnMenuClick('Wx::Frame=HASH(0x4c0b39c)', 'Wx::CommandEvent=SCALAR(0xc46f51c)') called at C:/strawberry/perl/site/lib/Demeter/UI/Artemis.pm line 346 Demeter::UI::Artemis::__ANON__('Wx::Frame=HASH(0x4c0b39c)', 'Wx::CommandEvent=SCALAR(0xc46f51c)') called at C:\strawberry\perl\site\bin\dartemis.bat line 29 eval {...} called at C:\strawberry\perl\site\bin\dartemis.bat line 29