How to correct these build errors?

[robledo_julio]

Error The Teacher Assignment file contains an invalid course. The teacher is XXX, the course is 3573.

Error Invalid related course found in the Course Link file. The course is 1003, the related course (invalid) is 1004.

Error Invalid course found in the Course Link file. The course is 1083.

[GinaC2122]

For all of these courses, the first thing I would check is that all the course settings are correct, in particular the one that says "schedule this course"

Gina Ciprotti