Groovy Script not importing Grade fields from HCM

We are Attempting to bring in the Primary Point of Contact's Grade from HCM into Helpdesk Classic screens- the script being used works for other fields but not Grade- any ideas

Here is the script:

def vo = newView('oraHcmUserNoDetailVO')

def Assignmentvo=newView('oraHcmAssignmentVO');

def gradevo = newView('oraHcmGradeVO')

def criteria = vo.createViewCriteria();

def criteriaRow = criteria.createRow();

def criteriaItem1 =criteriaRow.ensureCriteriaItem('Username'); // We can also use partyid

criteriaItem1.setOperator('=');

criteriaItem1.setValue(adf.context.getSecurityContext()?.getUserProfile()?.getUserID()); 

criteria.insertRow(criteriaRow);

vo.appendViewCriteria(criteria);

vo.executeQuery();

def row

def PersonID

if(vo.hasNext())

{

row=vo.next()

PersonID=row?.PersonId;

Assignmentvo.appendViewCriteria("PersonId=${PersonID} and PrimaryAssignmentFlag='Y' and AssignmentStatusType='ACTIVE'")