There are some undefined variables in SCORM, mainly typos.

File: mod/scorm/datamodels/scormlib.php
Line: around 359
Issue: $objectivesdata is undefined. It should be $objectivedata

File: mod/scorm/datamodels/scorm_13lib.php
Function: scorm_seq_termination
Issue: $attempt is undefined.

File: mod/scorm/datamodels/sequencinglib.php
Function: scorm_seq_choice_flow_tree
Line: 686
Issue: $preord is declared but never used and $preorder is undefined. $preord should be $preorder

File: mod/scorm/datamodels/sequencinglib.php
Line: 525 $act = scorm_get_sco($acti->id);
Issue: $acti is undefined.