EPM Automate command or function to update accounting date source filter value in data load rule FDM

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We have configure the FDMEE interface to extract the daily balances from GL to ARCS and also created the EPM automate script to execute the load. If we execute want to execute using system date we can use the function $SYSTEM_DATE[YYYY-MM-dd]$ in Accounting date source filter value and it will execute successfully using system date function but if u want to execute load apart from the system date (for ex. Previous month any date) we have to manually update the value of accounting date value in the source filter.

We want to make this entire load (if we want to load balances apart from system date