Cannot execute SELECT * FROM accountant WHERE del_time IS NULL AND ()

( ! ) Fatal error: Using $this when not in object context in /home/diraph/zeitan-server/httpdocs/system/lib/util.php on line 166
Call Stack
#TimeMemoryFunctionLocation
10.0001235528{main}( )../index.php:0
20.0017691448Ethna_Controller::main( )../index.php:4
30.0034761760Ethna_Controller->trigger( )../Ethna_Controller.php:723
40.0034762960Ethna_Controller->_trigger_WWW( )../Ethna_Controller.php:800
50.0055846200Ethna_Backend->perform( )../Ethna_Controller.php:878
60.03921111704System_Action_SearchDo->perform( )../Ethna_Backend.php:364
70.04241177960select( )../Do.php:246