Getting compilation error in OTL FF while trying to use ActualDate and RefDate for earned day and OT

We have created a work day definition to define earned (Grouping Threshold-60 mins; Spanning Days Rule-Start Day) and overtime (Spanning Days Rule-Split at day start time;Day Start Time: 12 AM Current Day ) spanning day rules. In Oracle’s documentation ‘Custom Threshold Formula That Uses Either the ActualDate or RefDate’ (https://docs.oracle.com/en/cloud/saas/human-resources/24c/oapff/custom-threshold-formula-that-uses-either-the-actualdate-or-refdate.html#u30237144) , it was mentioned that we can use ‘ActualDate’ and ‘RefDate’ as inputs in the custom fast formula for earned day and overtime day respectively. But when we tried to use these inputs, we were not able to compile the fast formula and it’s giving an error “Local Variable is