Dear Sirs, I am getting the memory access violation in the summary collection. please advise. Code: [Collection: AllVouchers] Type : Voucher Fetch : MasterID, VoucherTypeName, Date, VoucherNumber, PartyLedgerName, AllLedgerEntries.* Compute : NewExpLed : $AllLedgerEntries[1,@@ExpLed].LedgerName Compute : NewExpsAmt : $AllLedgerEntries[1,@@ExpLed].Amount Compute : NewPartyLed : $AllLedgerEntries[1,@@PartyLed].LedgerName Compute : NewPartyAmt : $AllLedgerEntries[1,@@PartyLed].Amount Compute : NewIncomeLed : $AllLedgerEntries[1,@@IncomeLed].LedgerName Compute : NewIncomeAmt : $AllLedgerEntries[1,@@IncomeLed].Amount Compute : NewTDSLed : $AllLedgerEntries[1,@@TDSLed].LedgerName Compute : NewTDSAmt : $AllLedgerEntries[1,@@TDSLed].Amount [Collection: AACMVoucherLoopColl] Source Collection : All Vouchers Fetch : MasterID, VoucherTypeName, Date, VoucherNumber, PartyLedgerName, Amount Fetch : NewExpLed, NewPartyLed, NewIncomeLed, NewTDSLed, NewExpsAmt, NewPartyAmt, NewIncomeAmt, NewTDSAmt Is ODBC Table : Yes [Collection : AACMVchSummaryColl] Source Collection : AACMVoucherLoopColl By : MyLedName2 : $NewPartyLed By : MyLedName3 : $NewExpLed Aggr Compute : ExpAmt : Sum : $NewExpsAmt Aggr Compute : TDSAmt : Sum : $NewTDSAmt Is ODBC Table : Yes [System : Formula] PartyLed : $$IsLedOfGrp:$LedgerName:$$GroupSundryDebtors or $$IsLedOfGrp:$LedgerName:$$GroupSundryCreditors ExpLed : $$IsLedOfGrp:$LedgerName:$$GroupDirectExpenses or $$IsLedOfGrp:$LedgerName:$$GroupIndirectExpenses or $$IsLedOfGrp:$LedgerName:$$GroupPurchase IncomeLed : $$IsLedOfGrp:$LedgerName:$$GroupDirectIncomes or $$IsLedOfGrp:$LedgerName:$$GroupIndirectIncomes or $$IsLedOfGrp:$LedgerName:$$GroupSales TransVchLedFilter : $Name != $LedgerName IsnotEmptyLedger : Not $$IsEmpty:$DebitTotals or not $$IsEmpty:$CreditTotals TDSLed : $Ledgername contains "TDS" and $Ledgername not contains "GST" and $Ledgername not contains "rec"