When adding AICC packages via the SCORM plugin, a case-sensitive search is performed on the descriptor files; if the descriptor files have upper case extensions (e.g. CST, CRS, DES or AU), the import fails with the message: Incorrect file package - missing imsmanifest.xml or AICC structure. Changing the extensions to lower case resolves the issue and allows for a successful import. To fix the issue, the search of the descriptor files would need to be made case-insensitive.