diff --git a/cor_custom/models/analytic.py b/cor_custom/models/analytic.py
index dc79a27..458a670 100755
--- a/cor_custom/models/analytic.py
+++ b/cor_custom/models/analytic.py
@@ -133,38 +133,46 @@ class AccountAnalyticLine(models.Model):
         res = super(AccountAnalyticLine, self).export_data(fields)
         for index, val in enumerate(res['datas']):
             #print("task_id", fields_name)
-            if fields_name.get('date') and fields_name.get('date') >= 0:
+            #if fields_name.get('date') and fields_name.get('date') >= 0:
+            if fields_name.get('date') is not None:
                 tdateindex = fields_name.get('date')
                 tdate = res['datas'][index][tdateindex]
                 if tdate:
                     res['datas'][index][tdateindex] = datetime.strftime(tdate, "%d/%m/%Y")
-            if fields_name.get('start_datetime') and fields_name.get('start_datetime') >= 0:
+            #if fields_name.get('start_datetime') and fields_name.get('start_datetime') >= 0:
+            if fields_name.get('start_datetime') is not None:
                 start_datetime_index = fields_name.get('start_datetime')
                 start_datetime = res['datas'][index][start_datetime_index]
                 if start_datetime:
                     res['datas'][index][start_datetime_index] = datetime.strftime(start_datetime, "%d/%m/%Y %H:%M")
-            if fields_name.get('end_datetime') and fields_name.get('end_datetime') >= 0:
+            if fields_name.get('end_datetime') is not None:
                 end_datetime_index = fields_name.get('end_datetime')
                 end_datetime= res['datas'][index][end_datetime_index]
                 if end_datetime:
                     res['datas'][index][end_datetime_index] = datetime.strftime(end_datetime, "%d/%m/%Y %H:%M")
-            if fields_name.get('task_id') and fields_name.get('task_id') >= 0:
+            if fields_name.get('task_id') is not None:
                 taskindex = fields_name.get('task_id')
                 ttask = res['datas'][index][taskindex]
                 if type(ttask) == bool:
                     res['datas'][index][taskindex] = ''
-            if fields_name.get('start_time') and fields_name.get('start_time') >= 0:
+            if fields_name.get('start_time') is not None:
                 starttimeindex = fields_name.get('start_time')
                 starttime = float(res['datas'][index][starttimeindex])
                 if starttime:
                     start_time = tools.format_duration(starttime)
                     res['datas'][index][starttimeindex] = start_time
-            if fields_name.get('end_time') and fields_name.get('end_time') >= 0:
+            if fields_name.get('end_time') is not None:
                 endtimeindex = fields_name.get('end_time')
                 endtime = float(res['datas'][index][endtimeindex])
                 if endtime:
                     end_time = tools.format_duration(endtime)
                     res['datas'][index][endtimeindex] = end_time
+            if fields_name.get('unit_amount') is not None:
+                durationindex = fields_name.get('unit_amount')
+                duration = res['datas'][index][durationindex] and float(res['datas'][index][durationindex])
+                if duration:
+                    duration_time = tools.format_duration(duration)
+                    res['datas'][index][durationindex] = duration_time
         return res
 
     @api.model