When you use an interdependent formula in a calculation script, the same rules apply as for the IF statement. You must:
In the following example, the entire formula is enclosed in parentheses and associated with the Opening Inventory member:
"Opening Inventory" (IF(NOT @ISMBR (Jan)) "Opening Inventory" = @PRIOR("Ending Inventory"); ENDIF;) "Ending Inventory" = "Opening Inventory" - Sales + Additions;