If a score for a student for a gradeitem that is being updated via import is locked, the entire set of scores being imported do not update, yet there is no message to that effect. The only current message is a notification of “Grade is locked”.

Problem - If a score for a student for a gradeitem that is being updated via import is locked, the entire
set of scores being imported do not update, yet there is no message to that effect. The only current message
is a notification of “Grade is locked”.
Level - Major
Fix Proposed - 1 line of code modified with better error message (or a 2nd line with additional message)
Solutions Proposed (S1) - print different error message (please note, the text would go into a string)
Extended solution (S2)- print at least the line that had the mismatch, possibly process entire file and list all.

To reproduce:

1. turn editing on, in the grader report, for a manual grade item,
2. lock a single students score. turn editing off.
3. Now import data into the gradebook
4. for that grade item, ensure you have that one student in your list
   You will see that NO grades are updated.