# Class File Error Messages #### **"Could not find teacher with teacherID XX"** This error occurs when the Class file references a teacherID that is not present in the Teacher file. The system matches each class to a teacher using the teacherID. If the teacher has not been imported from the Teacher file, the class cannot be imported. **How to fix:** 1. Open your Teacher file and check for the teacherID listed in the error message (XX). 2. If the teacher is missing, update your Teacher file to include the correct teacherID and re-import it. --- #### **"Class 'Math' already exists with a different teacher than '123'"** This error indicates that your **Class file** includes a row with the ClassID “Math” and the TeacherID “123,” but “Math” has already been assigned to another teacher. The **ClassID** must be unique for each teacher. Duplicate ClassID entries for different teachers can cause conflicts, particularly when importing Enrollment files, as the system cannot distinguish which students belong to which teacher. Example:
**TeacherID** **ClassID**
123 Math
456 Math

The system will flag the second row as an error because the ClassID “Math” is already assigned to teacher 123.

--- #### **How to Fix** To resolve this issue: - Ensure that the ClassID is unique for each teacher. For example, append a section number or teacher identifier to the ClassID:
**TeacherID** **ClassID**
123 123\_Math
456 456\_Math
- Update your Enrollment file to reflect the modified ClassID. Prior to fixing your import files and importing again, you will want to remove ClassID Math. You can remove an individual class by going to the ClassEditor, selecting the 'Show only Classes', locating and then clicking the red X next to the name, or you can select all of the affected classes and then click delete. You can also delete all of the event's resources, classes, and enrollments from the Import page. To do this, on the Imports page, click the Class file option within the File Type drop-down menu, then click 'Remove existing Classes'. --- #### **Important Note**

If the ClassID (e.g., “Math”) has already been imported with teacherID 123, you must first remove it before re-importing your corrected Class file.

If the errors you got through the import are related to the teachers/classes who will not participate in the conference event, then you can ignore these errors and move forward to the Enrollment file import.