Sir I try, this is for Standardprice control work on multiple Stock Item In invoice [#Field: VCH Batch Rate] Add : Option : VCH Sales Batch Rate : @@IsSales [!Field : VCH Sales Batch Rate] Validate : ($$IsEmpty:$$Value OR $$Value >= $Standardprice:StockItem:$StockItemName) [#Field: VCH Rate] Add : Option : VCH Sales Rate : @@IsSales [!Field : VCH Sales Rate] Validate : ($$IsEmpty:$$Value OR $$Value >= $Standardprice:StockItem:$StockItemName)