Thank you Tim. Yes, I did have AICC_Lesson_Status at the last page of the training. Thanks to your response, I could figure out the glitch. I had a test after each lesson then a final test at the end of the training. Originally, I shouldn’t grade the lessons’ tests, only the final test should be graded. When I reviewed the Results tab for each test, I found that I’ve graded lesson 1, and that’s why it fails the SCORM testing because it rendered “unsuccessful” status as soon as they complete lesson 1 test.
Many thanks for your response.