I'm try to find medical cost for employee in EMP02 (Employee Expenses) drives by Role and Department where i have to reference to EMP03 (Employee Driver by Role) and SYS08 Employee details.
In my formula I didn't query direct EMP03 source module into target module EMP02 is because in EMP02 I don't have Department and Role as EMP03. so then instead i mapping with intermediary SYS08 to provide department and role to pass to EMP03.
I use this formula
IF Employed? THEN 'EMP03 Employee Drivers by Role'.Medical Cost[LOOKUP: 'SYS08 Employee Details'.Department, LOOKUP: 'SYS08 Employee Details'.Role] ELSE 0
but i get this error below.

so please can some assist me how to correct this error?