Hello Rajakumar,
Kindly follow the below link, its the same query which you have raised. May be you will be the answer.
1) https://moodle.org/mod/forum/discuss.php?d=316627
2) https://moodle.org/mod/forum/discuss.php?d=115636
General help
Get enrolled students list.
This discussion has been locked so you can no longer reply to it.