A PHP Error was encountered

Severity: Warning

Message: Undefined array key "db_object"

Filename: store/ARC2_StoreSelectQueryHandler.php

Line Number: 178


Fatal error: Uncaught Error: Call to a member function simpleQuery() on null in /scalar-data/scalar.usc.edu/works/system/application/arc/vendor/semsol/arc2/store/ARC2_StoreSelectQueryHandler.php:178 Stack trace: #0 /scalar-data/scalar.usc.edu/works/system/application/arc/vendor/semsol/arc2/store/ARC2_StoreSelectQueryHandler.php(87): ARC2_StoreSelectQueryHandler->createTempTable('SELECT DISTINCT...') #1 /scalar-data/scalar.usc.edu/works/system/application/arc/vendor/semsol/arc2/store/ARC2_StoreConstructQueryHandler.php(31): ARC2_StoreSelectQueryHandler->runQuery(Array) #2 /scalar-data/scalar.usc.edu/works/system/application/arc/vendor/semsol/arc2/store/ARC2_Store.php(637): ARC2_StoreConstructQueryHandler->runQuery(Array, 0) #3 /scalar-data/scalar.usc.edu/works/system/application/arc/vendor/semsol/arc2/store/ARC2_Store.php(598): ARC2_Store->runQuery(Array, 'construct', 0, '\n CONS...') #4 /scalar-data/scalar.usc.edu/works/system/application/arc/vendor/semsol/arc2/store/ARC2_StoreDescribeQueryHandler.php(99): ARC2_Store->query('\n CONS...') #5 /scalar-data/scalar.usc.edu/works/system/application/arc/vendor/semsol/arc2/store/ARC2_Store.php(637): ARC2_StoreDescribeQueryHandler->runQuery(Array, 0) #6 /scalar-data/scalar.usc.edu/works/system/application/arc/vendor/semsol/arc2/store/ARC2_Store.php(598): ARC2_Store->runQuery(Array, 'describe', 0, 'DESCRIBE <urn:s...') #7 /scalar-data/scalar.usc.edu/works/system/application/libraries/RDF_Store.php(70): ARC2_Store->query('DESCRIBE <urn:s...') #8 /scalar-data/scalar.usc.edu/works/system/application/models/version_model.php(130): RDF_Store->get_by_urn('urn:scalar:vers...') #9 /scalar-data/scalar.usc.edu/works/system/application/models/version_model.php(150): Version_model->get('3369499', NULL, true) #10 /scalar-data/scalar.usc.edu/works/system/application/libraries/RDF_Object.php(416): Version_model->get_single('1330262', '3369499', NULL, true) #11 /scalar-data/scalar.usc.edu/works/system/application/libraries/RDF_Object.php(338): RDF_Object->_content(Object(stdClass), Array) #12 /scalar-data/scalar.usc.edu/works/system/application/libraries/RDF_Object.php(200): RDF_Object->_index(Array) #13 /scalar-data/scalar.usc.edu/works/system/application/controllers/book.php(138): RDF_Object->index(Array) #14 /scalar-data/scalar.usc.edu/works/system/core/CodeIgniter.php(326): Book->_remap('theodore-chen', Array) #15 /scalar-data/scalar.usc.edu/works/codeigniter.php(203): require_once('/scalar-data/sc...') #16 {main} thrown in /scalar-data/scalar.usc.edu/works/system/application/arc/vendor/semsol/arc2/store/ARC2_StoreSelectQueryHandler.php on line 178