Both my test LMS Ilias and GeoMaestro return Error403 as "Data Model Element is Read Only" Your chart has it as "Data Model Element Value Not Initialized" Which is it?
The error codes differ according to the version of SCORM you are using. In SCORM 1.2, the error code 403 is "Element is read only". In 2004, error code 403 represents "Data Model Element Value Not Initialized". If you click on the blue buttons with the standard versions in them at the top of that page, you will see the different error codes.