OTRS 5.0.3 Linux Oracle Enterprise Linux 7 x64 (RHEL 7) Database MariaDB 5.5 (MySQL 5.5) For sure I did something terrible wrong in states customizing. Please, you advise is welcome. _*Symptom:*_ When opening the "Queue view", system throws "HTTP 500 Internal server error". _*Research:*_ In Admin Log, I got the following error: " You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ') AND sq.group_id IN (1,10,2,3,4,5,6,7,8,9) LIMIT 10000' at line 1, SQL: 'SELECT COUNT(DISTINCT(st.id)) FROM ticket st INNER JOIN queue sq ON sq.id = st.queue_id WHERE 1=1 AND *st.ticket_state_id IN ( )* AND sq.group_id IN (1,10,2,3,4,5,6,7,8,9) LIMIT 10000' " In error_log, I got the following error: " [Tue Dec 8 11:31:42 2015] -e: DBD::mysql::st execute failed: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ') AND ( st.responsible_user_id IN (2) ) LIMIT 10000' at line 1 at /opt/otrs//Kernel/System/DB.pm line 666. ERROR: OTRS-CGI-46 Perl: 5.16.3 OS: linux Time: Tue Dec 8 11:31:42 2015 Message: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ') AND ( st.responsible_user_id IN (2) ) LIMIT 10000' at line 1, SQL: 'SELECT COUNT(DISTINCT(st.id)) FROM ticket st INNER JOIN queue sq ON sq.id = st.queue_id WHERE 1=1 AND st.ticket_state_id IN ( ) AND ( st.responsible_user_id IN (2) ) LIMIT 10000' RemoteAddress: 192.168.1.19 RequestURI: /otrs/index.pl Traceback (7571): Module: Kernel::System::Ticket::TicketSearch::TicketSearch Line: 2187 Module: Kernel::Output::HTML::ToolBar::TicketResponsible::Run Line: 54 Module: Kernel::Output::HTML::Layout::Header Line: 1342 Module: Kernel::Modules::AdminSelectBox::Run Line: 244 Module: Kernel::System::Web::InterfaceAgent::Run Line: 1041 Module: ModPerl::ROOT::ModPerl::Registry::opt_otrs_bin_cgi_2dbin_index_2epl::handler Line: 40 Module: (eval) (v1.99) Line: 207 Module: ModPerl::RegistryCooker::run (v1.99) Line: 207 Module: ModPerl::RegistryCooker::default_handler (v1.99) Line: 173 Module: ModPerl::Registry::handler (v1.99) Line: 32 " _*Further investigation:*_ This error was being throw by the system for a long while, but I never got a HTTP error 500. _*What changed:*_ Few minutes before the first error happening, I've edited one state, and changed its type from "open" to "pending": *_Additional information:_ *I do use fully customized states, not the defaults ones. I believe I did something wrong, or missed to configure some parameter. Would you please kindly point me which parameter in sysconfig will provide the information required for the IN (...) in this query? Thanks in advance, -- Atenciosamente, Edson Carlos Ericksson Richter