Traci, if you go to your account Settings > Reports and run a provisioning report for courses, you should see "2015-16.SCI101.Smith.S1" in the Course_ID column of that report. The course_id of the existing course has to match the course_id column in the sections.csv file that you are loading exactly.
My other thought is about the space between the word "Semester" and the "1" in the error message. If your sections.csv file has a space in there, Canvas may not be interpreting that correctly when trying to match the course_id in the sections.csv file with the course_id of the course itself.
My last thought is, if those two suggestions don't help, would you be willing to post a sanitized version of your files somewhere that we can see them? I'd like to see the courses provisioning report and the sections.csv file that you are loading.
This discussion post is outdated and has been archived. Please use the Community question forums and official documentation for the most current and accurate information.