Error while calling hr_assignment_api.update_emp_asg_criteria to update grade on assignment

FIXED after passing correct grade

Hello,

I am getting below error while calling the above API to update grade on assignment window. I am also giving my code for reference. Any pointers?

This grade does not exist at all, or is not completely within the assignment's date range.

declare

l_date        date  := trunc(sysdate); --to_date('01-OCT-2009', 'DD-MON-YYYY');

l_true          boolean := false;

l_assign_id       number := null; --32923;

l_obj           NUMBER;

l_datetrack_update_mode   VARCHAR2(30);

l_organization_id     number;

l_special_ceiling_step_id   number;

l_EFFECTIVE_START_DATE    DATE;

l_EFFECTIVE_END_DATE     DATE;

l_people_group_id       number;