diff --git a/modules/purchase_trade/purchase.py b/modules/purchase_trade/purchase.py
index dba26a1..61933b8 100755
--- a/modules/purchase_trade/purchase.py
+++ b/modules/purchase_trade/purchase.py
@@ -1225,6 +1225,7 @@ class Line(metaclass=PoolMeta):
         old_values = {}
 
         for records, values in zip(args[::2], args[1::2]):
+            logger.info("***WRITE***:%s",values)
             if 'quantity_theorical' in values:
                 for record in records:
                     old_values[record.id] = record.quantity_theorical
@@ -1237,6 +1238,7 @@ class Line(metaclass=PoolMeta):
                 old = Decimal(old_values[line.id] or 0)
                 new = Decimal(line.quantity_theorical or 0)
                 delta = new - old
+                logger.info("***WRITE_DELTA***:%s",delta)
                 if delta > 0:
                     virtual_lots = [lot for lot in (line.lots or []) if lot.lot_type == 'virtual']
                     if not virtual_lots: