kindly correct the formula for the reference of date in sub form.
=IIf(IsNull([AdjustmentSub].[Form]![ItemsFK]),Null,DSum("[Stock_In_Out]","TransactionsExtended","[ItemPK]=" & [AdjustmentSub].[Form]![ItemsFK] & "And [TranDate]<= #" & [Forms]![Adjustment].[Form]![TranDate] & "#"))
HeadFormName: Adjustment
SubformName: AdjustmentSub
DataReferenceQuery: TransactionsExtended
=IIf(IsNull([AdjustmentSub].[Form]![ItemsFK]),Null,DSum("[Stock_In_Out]","TransactionsExtended","[ItemPK]=" & [AdjustmentSub].[Form]![ItemsFK] & "And [TranDate]<= #" & [Forms]![Adjustment].[Form]![TranDate] & "#"))
HeadFormName: Adjustment
SubformName: AdjustmentSub
DataReferenceQuery: TransactionsExtended