How to get Employee Termination date in Payroll Relationship Elements Formula

Summary

How to get Employee Termination date in Payroll Relationship Elements Formula

Content

We have defined an elements Voluntary deduction at Payroll Relationship level. This element have formula attached, now I am trying to get the employee termination date using DB Item PER_ASG_REL_ACTUAL_TERMINATION_DATE

But I am getting the error. But this DB item is return when called from Regular Earnings elements formula  , where the element was defined at assignment level.

 

Can you please do advise how to retrieve the Termination date of employee in this scenario where the element defined at Payroll relationship level 

 

or Can this achieve using WSA_SET /WSA_GET method?