Error messages
No such package 'Value::Union()' in Value::Context::Package at line 326 of /opt/pg/lib/Value.pm in Value::Package at line 76 of [PG]/macros/Value.pl in main::Union at line 400 of [PG]/macros/Value.pl in main::interval_cmp at line 40 of [PG]/macros/Value.pl in (eval) at line 1 of [PG]/macros/Value.pl in main::__ANON__ at line 236 of /usr/lib64/perl5/5.8.8/x86_64-linux-thread-multi/Safe.pm in (eval) at line 236 of /usr/lib64/perl5/5.8.8/x86_64-linux-thread-multi/Safe.pm in Safe::reval at line 904 of /opt/pg/lib/WeBWorK/PG/Translator.pm in WeBWorK::PG::Translator::translate at line 346 of [WW]/lib/WeBWorK/PG/Local.pm in WeBWorK::PG::Local::new_helper at line 65 of [WW]/lib/WeBWorK/PG/Local.pm in (eval) at line 65 of [WW]/lib/WeBWorK/PG/Local.pm in WeBWorK::PG::Local::new at line 52 of [WW]/lib/WeBWorK/PG.pm in WeBWorK::PG::new at line 598 of [WW]/lib/WeBWorK/ContentGenerator/Problem.pm in WeBWorK::ContentGenerator::Problem::pre_header_initialize at line 176 of [WW]/lib/WeBWorK/ContentGenerator.pm in WeBWorK::ContentGenerator::go at line 353 of [WW]/lib/WeBWorK.pm in WeBWorK::dispatch at line 115 of [WW]/lib/Apache/WeBWorK.pm in (eval) at line 115 of [WW]/lib/Apache/WeBWorK.pm in Apache::WeBWorK::handler at line 0 of [PG]/macros/Value.pl in (eval) at line 0 of [PG]/macros/Value.pl Died within main::Union called at line 400 of [PG]/macros/extraAnswerEvaluators.pl from within main::interval_cmp called at line 40 of [TMPL]/ULibrary/setAlgebra13Inequalities/p9.pg