After the migration to OTRS 6 I see constantly the error of the Worker that rebuilds the Index. Indicates that you can not build the DateTime object but I do not know the reason for it The command I am using to manually execute the Worker is the following: bin/otrs.Console.pl Maint::Ticket::FulltextIndexRebuildWorker --force-pid --limit 700000 And error is: ERROR: OTRS-otrs.Console.pl-Maint::Ticket::FulltextIndexRebuildWorker-01 Perl: 5.16.3 OS: linux Time: Tue Feb 27 15:10:41 2018 Message: Error creating DateTime object. Traceback (9498): Module: Kernel::System::DateTime::new Line: 154 Module: Kernel::System::ObjectManager::_ObjectBuild Line: 306 Module: Kernel::System::ObjectManager::Create Line: 241 Module: Kernel::System::Ticket::TicketGet Line: 1339 Module: Kernel::System::Ticket::TicketArchiveFlagGet Line: 4040 Module: Kernel::System::Console::Command::Maint::Ticket::FulltextIndexRebuildWorker::ArticleIndexRebuild Line: 168 Module: Kernel::System::Console::Command::Maint::Ticket::FulltextIndexRebuildWorker::Run Line: 103 Module: (eval) Line: 460 Module: Kernel::System::Console::BaseCommand::Execute Line: 454 Module: Kernel::System::Console::InterfaceConsole::Run Line: 80 Module: bin/otrs.Console.pl Line: 38 Error: Can't call method "Delta" on an undefined value at /opt/otrs/Kernel/System/Ticket.pm line 1346. The error appears when I execute it manually as waiting for the CronSchulder to execute it. As a major background run a FullTextIndex rebuild and the process is stuck in 74.8%. bin/otrs.Console.pl Maint::Ticket::FulltextIndex --rebuild bin/otrs.Console.pl Maint::Ticket::FulltextIndex --status Indexed Articles: 74.8% (493212/659331)