diff --git a/include/class/acc_ledger_purchase.class.php b/include/class/acc_ledger_purchase.class.php
index 6d9c5c62e..a3e74c015 100644
--- a/include/class/acc_ledger_purchase.class.php
+++ b/include/class/acc_ledger_purchase.class.php
@@ -669,6 +669,10 @@ class  Acc_Ledger_Purchase extends Acc_Ledger
                 }
                 // insert into quant_purchase
                 //-----
+                if (empty( ${'e_march' . $i . '_price'}  ) ) ${'e_march' . $i . '_price'}  = 0;
+                if (empty( ${'e_march' . $i }  ) ) ${'e_march' . $i }  = 0;
+                if (empty( ${'e_quant' . $i }  ) ) ${'e_quant' . $i }  = 0;
+                
                 if ( $g_parameter->MY_TVA_USE=='Y')
                 {
 
diff --git a/include/class/acc_ledger_sold.class.php b/include/class/acc_ledger_sold.class.php
index fd6244708..17ad2acb0 100644
--- a/include/class/acc_ledger_sold.class.php
+++ b/include/class/acc_ledger_sold.class.php
@@ -374,6 +374,9 @@ class Acc_Ledger_Sold extends Acc_Ledger {
                     $op->oa_description = sql_string($e_comm);
                     $op->save_form_plan($_POST, $i, $j_id);
                 }
+                if (empty( ${'e_march' . $i . '_price'}  ) ) ${'e_march' . $i . '_price'}  = 0;
+                if (empty( ${'e_march' . $i }  ) ) ${'e_march' . $i }  = 0;
+                if (empty( ${'e_quant' . $i }  ) ) ${'e_quant' . $i }  = 0;
                 if ($g_parameter->MY_TVA_USE == 'Y') {
                     /* save into quant_sold */
                     $r = $this->db->exec_sql("select insert_quant_sold ($1,$2,$3,$4,$5,$6,$7,$8,$9,$10)", array(null, /* 1 */
@@ -609,7 +612,7 @@ class Acc_Ledger_Sold extends Acc_Ledger {
             'Erreur dans l\'enregistrement ' .
             __FILE__ . ':' . __LINE__ . ' ' .
             $e->getMessage();
-            echo $e->getTrace();
+            echo $e->getTraceAsString();
 
             $this->db->rollback();
             throw new Exception ($e);
diff --git a/include/lib/inum.class.php b/include/lib/inum.class.php
index f2755c499..6cc9f4e1c 100644
--- a/include/lib/inum.class.php
+++ b/include/lib/inum.class.php
@@ -82,7 +82,7 @@ class INum extends IText
             $this->javascript='onchange="format_number(this,'.$this->prec.');"';
         }
         $this->name=($p_name==null)?$this->name:$p_name;
-        $this->value=($p_value==null)?$this->value:$p_value;
+        $this->value=($p_value===null)?$this->value:$p_value;
         $this->id=($this->id=="")?$this->name:$this->id;
 
         if ($this->readOnly==true)