When trying to run analytics for an exam in New Analytics, we are receiving a message indicating that we are exceeding file limits (for the exam, not the course) and are unable to get the analytical drill down for students and for the course

The number of students is not large (<30), so it is probably centered on the size of the exam.  Is there a resource we can be directed to or best practice on how to ensure that parameters of an exam are within range to allow for  analysis in New Analytics?