Dear Sir, I am facing an issue on Walk Collection. I need help from you. There is Two Aggregate udf, Which are the storage of two subform value at stock Item Level Value are getting stored, & Walk through single arregate Collections report is okay, But I need value from both arregate udf. Report Column as like as: Item Name, Stkimygenericname, StckManufacturerlinednamedudf [System: Udf] Stkigeneric:Aggregate:2001 Stkimygenericname:String:2001 StckManufacturerlinedAggre:Aggregate:3001 StckManufacturerlinednamedudf:String:3001 [COLLECTION:Genericdisplay] SOURCECOLLECTION:STOCKITEM WALK : Stkigeneric ;, StckManufacturerlinedAggre By : ItemNamez : $Name By : Tradingnamez : $STKIMYGENERICNAME By : Manufacturerez:$StckManufacturerlinednamedudf I had tried to Create Collection as below also but not succeed. [Collection:Xcoll] Type:Stkigeneric:Company ;Child Of:##Svcurrentcompany Format:$Stkimygenericname,20 Format: $StckManufacturerlinednamedudf,20 [Collection:Ycoll] Type:StckManufacturerlinedAggre:Stock Item ;Child Of:##Svcurrentcompany Format: $StckManufacturerlinednamedudf,20 Format:$Stkimygenericname,20 [Collection: MyColl] Collections:Xcoll, Ycoll Will someone please tell me how can I walk through both aggregate collection ? Thank You