Fetch Opening Issue

I want Before Period Value(Opening)

Any Help Me Sir.....

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[System:Formula]

LedOpeningsdr : if $$ParentPeriodFrom < @@DSPFromDate then $$CollectionField:$OpeningBalanceJobd:1:MyLedOpVals Else $TBalOpening:Ledger:#LedgerName



[Collection: MyLedOpVals]

Parm Var : pvFrmDate : Date : $$ParentPeriodFrom
Parm Var : pvToDate : Date : @@DSPFromDateLessOne

Source Collection : MyLedOpValSrcs

Compute : OpeningBalanceJobd : $OpeningBalanceJob

[Collection: MyLedOpValSrcs]

Parm Var : pvFrmDate : Date : $$ParentPeriodFrom
Parm Var : pvToDate : Date : @@DSPFromDateLessOne

Type : Ledger

Compute : OpeningBalanceJobd : If @@IsNameLedgerName Then $$FromValue:##pvFrmDate:$$ToValue:##pvToDate:$billedqty Else $$AsAmount:0

Filter : IsNameLedgerName