In this guide, we will cover how to troubleshoot the School Census Error 2578.
DfE Validation:
- <Sessionspossible> are not required for the summer 2nd half term for PupilsNoLongerOnRoll where <leavingdate>is on or before 2026-05-24
DfE Explanation:
- Attendance data for the second half of the summer term is not required for this pupil as leaving date shows they left prior to this
For more information on the Census Module see here.
Access: The permissions required to run and troubleshoot the Census are found in the Census Module of Config>Setup>Roles and Permissions. Each tick box on the right determines which functions are visible/available on the page for users with the selected Role.

The likely cause of this query/error is that the Student left before the end of the Academic Year, potentially during a half term/non Academic time.
If Attendance Sessions Possible for the Student is 0, then it is expected that sessions with Cancelled Codes is not also 0, as Cancelled Codes remove the Possible Attendance Sessions.
If you are sure that the Leaving date and the Attendance of the Student are both correct, you will need to upload a Return Level Note to Collect when you submit your Census Return stating that this is the case.
IMPORTANT in order for the resolved error/query to be removed from the list of errors/queries you would need to generate a new Census return and remember to use save & validate for the errors/queries to update/clear.