Help with configurable calculation for a list of accounts

Summary:

@MEMBER("Account") did not return expected results.

Content (please ensure you mask any confidential information):

I’m currently writing a rollforward for a requirement. The rule is to roll the amount from December of the previous year from one account (let’s call it the EOP account) to a BOP account. We’re using an alias table to store the name of the EOP account.

The code below works perfectly for a specific account. However, when I try to apply the same rule to a group of accounts, it doesn’t yield the expected results. It appears that @MEMBER("Account")