A PHP Error was encountered
Severity: Warning
Message: Undefined array key 0
Filename: models/version_model.php
Line Number: 224
A PHP Error was encountered
Severity: Warning
Message: Attempt to read property "version_id" on null
Filename: models/version_model.php
Line Number: 224
A PHP Error was encountered
Severity: 8192
Message: str_replace(): Passing null to parameter #2 ($replace) of type array|string is deprecated
Filename: core/MY_Model.php
Line Number: 452
Fatal error: Uncaught Error: Attempt to assign property "urn" on null in /scalar-data/scalar.usc.edu/works/system/application/models/version_model.php:224
Stack trace:
#0 /scalar-data/scalar.usc.edu/works/system/application/controllers/book.php(118): Version_model->get_by_version_num('180150', 8)
#1 /scalar-data/scalar.usc.edu/works/system/core/CodeIgniter.php(326): Book->_remap('field-guides-to...', Array)
#2 /scalar-data/scalar.usc.edu/works/codeigniter.php(203): require_once('/scalar-data/sc...')
#3 {main}
thrown in /scalar-data/scalar.usc.edu/works/system/application/models/version_model.php on line 224