Thanks Pijo for help..!! It was working perfect if we take Array reference and multiple attributes present in the same file. But this is failing only one attribute is present in the file.. it says not an array reference.Below is my xml data dumper o/p.

$VAR1 = {
          'cdr' => {
                   'networkInfo' => {
                                    'extPayer' => '13000',
                                    'ggsnAddress' => '172.26.33.44',
                                    'instanceId' => '0',
                                    'imei' => '0',
                                    'networkUsageIdentifier' => '172.2
+6.33.44',
                                    'ReleaseCause' => '00144',
                                    'spendControlId' => '0',
                                    'defaultPayer' => '13000',
                                    'gprsLocationInfo' => '0130120857'
+,
                                    'sessionId' => '151014195900000010
+1',
                                    'errorCode' => '0',
                                    'requestType' => '1001',
                                    'timeZone' => '',
                                    'ccRequestType' => '3',
                                    'defaultExtPayer' => '13000',
                                    'sgsnAddress' => '172.26.33.44',
                                    'gprsLBC' => '0',
                                    'gprsApn' => 'tecnotree.com',
                                    'connectionType' => '0',
                                    'gprsAttributes' => '',
                                    'eventDateTime' => '20151014195959
+',
                                    'imsiMccMnc' => '724110000000069',
                                    'sequenceNumber' => '0',
                                    'unitType' => '2',
                                    'holidayCode' => '0',
                                    'serviceIdentifier' => '0',
                                    'ratingGroup' => '1029',
                                    'pdpType' => '0',
                                    'pdpAddress' => '172.26.33.44',
                                    'sgsnMccMnc' => '',
                                    'specialLocationClassId' => '0',
                                    'eventType' => '0',
                                    'payerType' => '0',
                                    'connectionId' => '005029740902190
+',
                                    'payer' => '13000',
                                    'cgAddress' => '',
                                    'redirectionCode' => '0',
                                    'callReferenceNumber' => '11499269
+2',
                                    'ggsnMccMnc' => '',
                                    'mvnoId' => '3',
                                    'originatingNetworkId' => '1081',
                                    'chargingId' => '114992692',
                                    'actionDateTime' => '2015101419595
+9',
                                    'tariffToken' => '0',
                                    'callTerminationCause' => '1',
                                    'exponent' => '-6'
                                  },
                   'payerInfo' => {
                                  'newPayerStatus' => '2',
                                  'noOfPayerValidity' => '0',
                                  'prevPayerStatus' => '2',
                                  'walletDetails' => {
                                                     'walletId' => '1'
+,
                                                     'prevWalletBalanc
+e' => '9856000000000',
                                                     'prevExpiryDate' 
+=> '20151202',
                                                     'expiryFlag' => '
+0',
                                                     'newWalletBalance
+' => '9854000000000',
                                                     'newExpiryDate' =
+> '20151202'
                                                   },
                                  'noOfWalletsUsed' => '1',
                                  'baseWalletBalance' => '985400000000
+0'
                                },
                   'pricedInfo' => {
                                   'totalUsedUnits' => '2000',
                                   'totalCostPrice' => '2000000000',
                                   'bucket' => {
                                               'rateId' => '1347',
                                               'discountPercentage' =>
+ '0',
                                               'startUnits' => '1',
                                               'exchangeRate' => '1000
+000',
                                               'taxFormulaId' => '1002
+',
                                               'componentId' => '0',
                                               'taxWalletId' => '1',
                                               'currencyRateId' => '1'
+,
                                               'discountArticleId' => 
+'1001',
                                               'walletId' => '1',
                                               'salePrice' => '2000000
+000',
                                               'discountAmount' => '0'
+,
                                               'TaxDetail' => {
                                                              'Tax' =>
+ {
                                                                      
+ 'amount' => '0',
                                                                      
+ 'count' => '1',
                                                                      
+ 'article' => '1009'
                                                                     }
                                                            },
                                               'usedUnits' => '2000',
                                               'endUnits' => '2000',
                                               'taxApplied' => '0',
                                               'debitedValue' => '2000
+000000',
                                               'costPrice' => '2000000
+000',
                                               'dimensionId' => '0',
                                               'serviceKey' => '0',
                                               'chargeArticleId' => '1
+',
                                               'tariffId' => '1422'
                                             },
                                   'taxingOptionUsed' => '0',
                                   'totalTax' => '0',
                                   'totalSalePrice' => '2000000000',
                                   'chargeSummary' => {
                                                      'dimensionSummar
+y' => {
                                                                      
+      'dimensionId' => '0',
                                                                      
+      'componentSummary' => {
                                                                      
+                            'totalSalePrice' => '2000000000',
                                                                      
+                            'totalCostPrice' => '2000000000',
                                                                      
+                            'componentId' => '0',
                                                                      
+                            'totalDiscountAmount' => '0',
                                                                      
+                            'bucketsUsed' => '1'
                                                                      
+                          }
                                                                      
+    }
                                                    },
                                   'bucketsUsed' => '1',
                                   'totalDiscountAmount' => '0'
                                 }
                 }
        };
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