diff --git a/src/main/java/org/gcube/accounting/aggregator/aggregation/Aggregator.java b/src/main/java/org/gcube/accounting/aggregator/aggregation/Aggregator.java
index 6230635..e5782e2 100644
--- a/src/main/java/org/gcube/accounting/aggregator/aggregation/Aggregator.java
+++ b/src/main/java/org/gcube/accounting/aggregator/aggregation/Aggregator.java
@@ -286,17 +286,21 @@ public class Aggregator {
 			Utility.printLine(malformedRecordsFile, json);
 			
 			if(record instanceof AggregatedServiceUsageRecord){
-				if(record.getResourceProperty(AggregatedServiceUsageRecord.MIN_INVOCATION_TIME)==null){
-					record.setResourceProperty(AggregatedServiceUsageRecord.MIN_INVOCATION_TIME, record.getResourceProperty(ServiceUsageRecord.DURATION));
+				try {
+					if(record.getResourceProperty(AggregatedServiceUsageRecord.MIN_INVOCATION_TIME)==null){
+						record.setResourceProperty(AggregatedServiceUsageRecord.MIN_INVOCATION_TIME, record.getResourceProperty(ServiceUsageRecord.DURATION));
+					}
+					if(record.getResourceProperty(AggregatedServiceUsageRecord.MAX_INVOCATION_TIME)==null) {
+						record.setResourceProperty(AggregatedServiceUsageRecord.MAX_INVOCATION_TIME, record.getResourceProperty(ServiceUsageRecord.DURATION));
+					}
+					if(record.getResourceProperty(AggregatedServiceUsageRecord.CALLER_QUALIFIER)==null) {
+						record.setResourceProperty(AggregatedServiceUsageRecord.CALLER_QUALIFIER, AbstractServiceUsageRecord.UNKNOWN);
+					}
+					record.validate();
+				} catch (Exception ex) {
+					return;
 				}
-				if(record.getResourceProperty(AggregatedServiceUsageRecord.MAX_INVOCATION_TIME)==null) {
-					record.setResourceProperty(AggregatedServiceUsageRecord.MAX_INVOCATION_TIME, record.getResourceProperty(ServiceUsageRecord.DURATION));
-				}
-				if(record.getResourceProperty(AggregatedServiceUsageRecord.CALLER_QUALIFIER)==null) {
-					record.setResourceProperty(AggregatedServiceUsageRecord.CALLER_QUALIFIER, AbstractServiceUsageRecord.UNKNOWN);
-				}
-				record.validate();
-			}else {
+			} else {
 				return;
 			}
 			
diff --git a/src/test/java/org/gcube/accounting/aggregator/plugin/AccountingAggregatorPluginTest.java b/src/test/java/org/gcube/accounting/aggregator/plugin/AccountingAggregatorPluginTest.java
index 2d85ba7..99e281f 100644
--- a/src/test/java/org/gcube/accounting/aggregator/plugin/AccountingAggregatorPluginTest.java
+++ b/src/test/java/org/gcube/accounting/aggregator/plugin/AccountingAggregatorPluginTest.java
@@ -161,13 +161,13 @@ public class AccountingAggregatorPluginTest extends ContextTest {
 		inputs.put(AccountingAggregatorPlugin.FORCE_RERUN, true);
 		inputs.put(AccountingAggregatorPlugin.FORCE_RESTART, true);
 		
-		Calendar aggregationStartCalendar = Utility.getAggregationStartCalendar(2020, Calendar.JANUARY, 1);
+		Calendar aggregationStartCalendar = Utility.getAggregationStartCalendar(2019, Calendar.DECEMBER, 1);
 		String aggregationStartDate = AccountingAggregatorPlugin.AGGREGATION_START_DATE_DATE_FORMAT.format(aggregationStartCalendar.getTime());
 		logger.trace("{} : {}", AccountingAggregatorPlugin.AGGREGATION_START_DATE_INPUT_PARAMETER, aggregationStartDate);
 		inputs.put(AccountingAggregatorPlugin.AGGREGATION_START_DATE_INPUT_PARAMETER, aggregationStartDate);
 		
 		// Calendar aggregationEndCalendar = Utility.getEndCalendarFromStartCalendar(AggregationType.MONTHLY, aggregationStartCalendar, 1);
-		Calendar aggregationEndCalendar = Utility.getAggregationStartCalendar(2020, Calendar.FEBRUARY, 1);
+		Calendar aggregationEndCalendar = Utility.getAggregationStartCalendar(2020, Calendar.JANUARY, 1);
 		/*
 		String aggregationEndDate = AccountingAggregatorPlugin.AGGREGATION_START_DATE_DATE_FORMAT.format(aggregationEndCalendar.getTime());
 		logger.trace("{} : {}", AccountingAggregatorPlugin.AGGREGATION_START_DATE_INPUT_PARAMETER, aggregationEndDate);
diff --git a/src/test/java/org/gcube/accounting/aggregator/plugin/MyTest.java b/src/test/java/org/gcube/accounting/aggregator/plugin/MyTest.java
index 861610f..637e30f 100644
--- a/src/test/java/org/gcube/accounting/aggregator/plugin/MyTest.java
+++ b/src/test/java/org/gcube/accounting/aggregator/plugin/MyTest.java
@@ -1,8 +1,6 @@
 package org.gcube.accounting.aggregator.plugin;
 
-import java.text.DateFormat;
 import java.text.ParseException;
-import java.text.SimpleDateFormat;
 import java.util.Calendar;
 import java.util.Date;
 import java.util.Map;