diff --git a/htdocs/core/class/commonobject.class.php b/htdocs/core/class/commonobject.class.php
index 1508575ba37..aba487ab4a0 100644
--- a/htdocs/core/class/commonobject.class.php
+++ b/htdocs/core/class/commonobject.class.php
@@ -4118,7 +4118,7 @@ abstract class CommonObject
 
 		$i = 0;
 
-		print "<tbody>\n";
+		print "<!-- begin printObjectLines() --><tbody>\n";
 		foreach ($this->lines as $line)
 		{
 			//Line extrafield
diff --git a/htdocs/mrp/class/mo.class.php b/htdocs/mrp/class/mo.class.php
index 982bff9d9ae..1dced508aec 100644
--- a/htdocs/mrp/class/mo.class.php
+++ b/htdocs/mrp/class/mo.class.php
@@ -157,32 +157,32 @@ class Mo extends CommonObject
 	/**
 	 * @var int    Name of subtable line
 	 */
-	//public $table_element_line = 'mrp_moline';
+	public $table_element_line = 'mo_production';
 
 	/**
 	 * @var int    Field with ID of parent key if this field has a parent
 	 */
-	//public $fk_element = 'fk_mo';
+	public $fk_element = 'fk_mo';
 
 	/**
 	 * @var int    Name of subtable class that manage subtable lines
 	 */
-	//public $class_element_line = 'Moline';
+	public $class_element_line = 'MoLine';
 
 	/**
 	 * @var array	List of child tables. To test if we can delete object.
 	 */
-	//protected $childtables=array();
+	protected $childtables=array('mrp_production');
 
 	/**
 	 * @var array	List of child tables. To know object to delete on cascade.
 	 */
-	//protected $childtablesoncascade=array('mrp_modet');
+	protected $childtablesoncascade=array('mrp_production');
 
 	/**
 	 * @var MoLine[]     Array of subtable lines
 	 */
-	//public $lines = array();
+	public $lines = array();
 
 
 
@@ -252,7 +252,7 @@ class Mo extends CommonObject
 			{
 				foreach($bom->lines as $line)
 				{
-					$moline = new MOLine($this->db);
+					$moline = new MoLine($this->db);
 
 					$moline->fk_mo = $this->id;
 					$moline->qty = $line->qty * $this->qty * $bom->efficiency;
@@ -1007,6 +1007,85 @@ class MoLine extends CommonObjectLine
 		return $result;
 	}
 
+	/**
+	 * Load list of objects in memory from the database.
+	 *
+	 * @param  string      $sortorder    Sort Order
+	 * @param  string      $sortfield    Sort field
+	 * @param  int         $limit        limit
+	 * @param  int         $offset       Offset
+	 * @param  array       $filter       Filter array. Example array('field'=>'valueforlike', 'customurl'=>...)
+	 * @param  string      $filtermode   Filter mode (AND or OR)
+	 * @return array|int                 int <0 if KO, array of pages if OK
+	 */
+	public function fetchAll($sortorder = '', $sortfield = '', $limit = 0, $offset = 0, array $filter = array(), $filtermode = 'AND')
+	{
+		global $conf;
+
+		dol_syslog(__METHOD__, LOG_DEBUG);
+
+		$records = array();
+
+		$sql = 'SELECT ';
+		$sql .= $this->getFieldList();
+		$sql .= ' FROM '.MAIN_DB_PREFIX.$this->table_element.' as t';
+		if (isset($this->ismultientitymanaged) && $this->ismultientitymanaged == 1) $sql .= ' WHERE t.entity IN ('.getEntity($this->table_element).')';
+		else $sql .= ' WHERE 1 = 1';
+		// Manage filter
+		$sqlwhere = array();
+		if (count($filter) > 0) {
+			foreach ($filter as $key => $value) {
+				if ($key == 't.rowid') {
+					$sqlwhere[] = $key.'='.$value;
+				}
+				elseif (strpos($key, 'date') !== false) {
+					$sqlwhere[] = $key.' = \''.$this->db->idate($value).'\'';
+				}
+				elseif ($key == 'customsql') {
+					$sqlwhere[] = $value;
+				}
+				else {
+					$sqlwhere[] = $key.' LIKE \'%'.$this->db->escape($value).'%\'';
+				}
+			}
+		}
+		if (count($sqlwhere) > 0) {
+			$sql .= ' AND ('.implode(' '.$filtermode.' ', $sqlwhere).')';
+		}
+
+		if (!empty($sortfield)) {
+			$sql .= $this->db->order($sortfield, $sortorder);
+		}
+		if (!empty($limit)) {
+			$sql .= ' '.$this->db->plimit($limit, $offset);
+		}
+
+		$resql = $this->db->query($sql);
+		if ($resql) {
+			$num = $this->db->num_rows($resql);
+			$i = 0;
+			while ($i < min($limit, $num))
+			{
+				$obj = $this->db->fetch_object($resql);
+
+				$record = new self($this->db);
+				$record->setVarsFromFetchObj($obj);
+
+				$records[$record->id] = $record;
+
+				$i++;
+			}
+			$this->db->free($resql);
+
+			return $records;
+		} else {
+			$this->errors[] = 'Error '.$this->db->lasterror();
+			dol_syslog(__METHOD__.' '.join(',', $this->errors), LOG_ERR);
+
+			return -1;
+		}
+	}
+
 	/**
 	 * Update object into database
 	 *
diff --git a/htdocs/mrp/mo_card.php b/htdocs/mrp/mo_card.php
index 9534e643e0d..f22c42140f5 100644
--- a/htdocs/mrp/mo_card.php
+++ b/htdocs/mrp/mo_card.php
@@ -504,9 +504,11 @@ if ($object->id > 0 && (empty($action) || ($action != 'edit' && $action != 'crea
     	if (!empty($object->lines) || ($object->status == $object::STATUS_DRAFT && $permissiontoadd && $action != 'selectlines' && $action != 'editline'))
     	{
     	    print '<table id="tablelines" class="noborder noshadow" width="100%">';
+
+    	    print '<tr><td>TODO...</td></tr>';
     	}
 
-    	if (!empty($object->lines))
+    	/*if (!empty($object->lines))
     	{
     		$object->printObjectLines($action, $mysoc, null, GETPOST('lineid', 'int'), 1, '/mrp/tpl');
     	}
@@ -522,7 +524,7 @@ if ($object->id > 0 && (empty($action) || ($action != 'edit' && $action != 'crea
     	        $parameters = array();
     	        $reshook = $hookmanager->executeHooks('formAddObjectLine', $parameters, $object, $action); // Note that $action and $object may have been modified by hook
     	    }
-    	}
+    	} */
 
     	if (!empty($object->lines) || ($object->status == $object::STATUS_DRAFT && $permissiontoadd && $action != 'selectlines' && $action != 'editline'))
     	{
@@ -530,6 +532,7 @@ if ($object->id > 0 && (empty($action) || ($action != 'edit' && $action != 'crea
     	}
     	print '</div>';
 
+
     	print "</form>\n";
 	}
 
diff --git a/htdocs/mrp/mo_production.php b/htdocs/mrp/mo_production.php
index 28800d23bd2..931a6253510 100644
--- a/htdocs/mrp/mo_production.php
+++ b/htdocs/mrp/mo_production.php
@@ -326,13 +326,20 @@ if ($object->id > 0 && (empty($action) || ($action != 'edit' && $action != 'crea
     	    include DOL_DOCUMENT_ROOT.'/core/tpl/ajaxrow.tpl.php';
     	}
 
+    	$object->fetchLines();
+
     	print '<div class="div-table-responsive-no-min">';
     	if (!empty($object->lines) || ($object->status == $object::STATUS_DRAFT && $permissiontoadd && $action != 'selectlines' && $action != 'editline'))
     	{
-    	    print '<table id="tablelines" class="noborder noshadow" width="100%">';
+    		print '<table id="tablelines" class="noborder noshadow" width="100%">';
+
+    	    print '<tr><td>TODO...</td></tr>';
+
+    	    //var_dump($object->lines);
+
     	}
 
-    	if (!empty($object->lines))
+    	/*if (!empty($object->lines))
     	{
     		$object->printObjectLines($action, $mysoc, null, GETPOST('lineid', 'int'), 1, '/mrp/tpl');
     	}
@@ -348,7 +355,7 @@ if ($object->id > 0 && (empty($action) || ($action != 'edit' && $action != 'crea
     	        $parameters = array();
     	        $reshook = $hookmanager->executeHooks('formAddObjectLine', $parameters, $object, $action); // Note that $action and $object may have been modified by hook
     	    }
-    	}
+    	}*/
 
     	if (!empty($object->lines) || ($object->status == $object::STATUS_DRAFT && $permissiontoadd && $action != 'selectlines' && $action != 'editline'))
     	{