diff --git a/htdocs/bom/bom_card.php b/htdocs/bom/bom_card.php
index 0f2dfb5e52b..7baf187756c 100644
--- a/htdocs/bom/bom_card.php
+++ b/htdocs/bom/bom_card.php
@@ -141,6 +141,7 @@ if (empty($reshook))
 		if ($result <= 0)
 		{
 			setEventMessages($bomline->error, $bomline->errors, 'errors');
+			$action = '';
 		}
 	}
 }
@@ -386,7 +387,7 @@ if ($object->id > 0 && (empty($action) || ($action != 'edit' && $action != 'crea
 
 	    if (! empty($object->lines))
 	    {
-//	        $ret = $object->printObjectLines($action, $mysoc, $soc, $lineid, 1);
+	        $object->printObjectLines($action, $mysoc, null, GETPOST('lineid', 'int'), 1);
 	    }
 
 	    // Form to add new line
@@ -395,7 +396,7 @@ if ($object->id > 0 && (empty($action) || ($action != 'edit' && $action != 'crea
 	        if ($action != 'editline')
 	        {
 	            // Add products/services form
-	            $object->formAddObjectLine(1, $mysoc, $soc, '/bom/tpl');
+	            $object->formAddObjectLine(1, $mysoc, null, '/bom/tpl');
 
 	            $parameters = array();
 	            $reshook = $hookmanager->executeHooks('formAddObjectLine', $parameters, $object, $action); // Note that $action and $object may have been modified by hook
diff --git a/htdocs/bom/class/bom.class.php b/htdocs/bom/class/bom.class.php
index de67cbc82e8..56f790052e7 100644
--- a/htdocs/bom/class/bom.class.php
+++ b/htdocs/bom/class/bom.class.php
@@ -94,9 +94,9 @@ class BOM extends CommonObject
 	    'ref' => array('type'=>'varchar(128)', 'label'=>'Ref', 'enabled'=>1, 'noteditable'=>1, 'visible'=>4, 'position'=>10, 'notnull'=>1, 'default'=>'(PROV)', 'index'=>1, 'searchall'=>1, 'comment'=>"Reference of BOM", 'showoncombobox'=>'1',),
 		'label' => array('type'=>'varchar(255)', 'label'=>'Label', 'enabled'=>1, 'visible'=>1, 'position'=>30, 'notnull'=>1, 'searchall'=>1, 'showoncombobox'=>'1',),
 		'description' => array('type'=>'text', 'label'=>'Description', 'enabled'=>1, 'visible'=>-1, 'position'=>60, 'notnull'=>-1,),
-		'fk_product' => array('type'=>'integer:Product:product/class/product.class.php', 'label'=>'Product', 'enabled'=>1, 'visible'=>1, 'position'=>50, 'notnull'=>1, 'index'=>1, 'help'=>'ProductBOMHelp'),
+		'fk_product' => array('type'=>'integer:Product:product/class/product.class.php', 'label'=>'Product', 'enabled'=>1, 'visible'=>1, 'position'=>35, 'notnull'=>1, 'index'=>1, 'help'=>'ProductBOMHelp'),
 	    'qty' => array('type'=>'real', 'label'=>'Quantity', 'enabled'=>1, 'visible'=>1, 'default'=>1, 'position'=>55, 'notnull'=>1, 'isameasure'=>'1', 'css'=>'maxwidth75imp'),
-		'efficiency' => array('type'=>'real', 'label'=>'ManufacturingEfficiency', 'enabled'=>1, 'visible'=>1, 'default'=>1, 'position'=>100, 'notnull'=>0, 'css'=>'maxwidth50imp', 'help'=>'ValueOfMeansLoss'),
+		'efficiency' => array('type'=>'real', 'label'=>'ManufacturingEfficiency', 'enabled'=>1, 'visible'=>-1, 'default'=>1, 'position'=>100, 'notnull'=>0, 'css'=>'maxwidth50imp', 'help'=>'ValueOfMeansLoss'),
 		'note_public' => array('type'=>'html', 'label'=>'NotePublic', 'enabled'=>1, 'visible'=>-1, 'position'=>161, 'notnull'=>-1,),
 		'note_private' => array('type'=>'html', 'label'=>'NotePrivate', 'enabled'=>1, 'visible'=>-1, 'position'=>162, 'notnull'=>-1,),
 		'date_creation' => array('type'=>'datetime', 'label'=>'DateCreation', 'enabled'=>1, 'visible'=>-2, 'position'=>300, 'notnull'=>1,),
@@ -291,27 +291,8 @@ class BOM extends CommonObject
 	{
 		$this->lines=array();
 
-		// Load lines with object BOMLine
-        $sql = 'SELECT rowid, fk_product, description, qty, rank WHERE fk_bom = '.$this->id;
-
-        $resql=$this->db->query($sql);
-        if ($resql)
-        {
-            $obj = $this->db->fetch_object($resql);
-            if ($obj)
-            {
-                $newline = new BOMLine($this->db);
-                $newline->id = $obj->rowid;
-                $newline->fk_product = $obj->fk_product;
-                $newline->description = $obj->description;
-                $newline->qty = $obj->qty;
-                $newline->rank = $obj->rank;
-
-                $this->lines[] = $newline;
-            }
-        }
-
-		return count($this->lines)?1:0;
+		$result = $this->fetchLinesCommon();
+		return $result;
 	}
 
 	/**
@@ -333,11 +314,11 @@ class BOM extends CommonObject
 
 		$records=array();
 
-		$sql = 'SELECT';
-		$sql .= ' t.rowid';
-		// TODO Get all fields
+		$sql = 'SELECT ';
+		$sql .= $this->getFieldList();
 		$sql .= ' FROM ' . MAIN_DB_PREFIX . $this->table_element. ' as t';
-		$sql .= ' WHERE t.entity = '.$conf->entity;
+		if ($this->ismultientitymanaged) $sql .= ' WHERE t.entity IN ('.getEntity($this->table_element).')';
+		else $sql .= ' WHERE 1 = 1';
 		// Manage filter
 		$sqlwhere = array();
 		if (count($filter) > 0) {
@@ -374,11 +355,8 @@ class BOM extends CommonObject
 			while ($obj = $this->db->fetch_object($resql))
 			{
 				$record = new self($this->db);
+				$record->setVarsFromFetchObj($obj);
 
-				$record->id = $obj->rowid;
-				// TODO Get other fields
-
-				//var_dump($record->id);
 				$records[$record->id] = $record;
 			}
 			$this->db->free($resql);
@@ -858,7 +836,7 @@ class BOM extends CommonObject
 	    $this->lines=array();
 
 	    $objectline = new BOMLine($this->db);
-	    $result = $objectline->fetchAll('', '', 0, 0, array('fk_bom'=>$this->id));
+	    $result = $objectline->fetchAll('', '', 0, 0, array('customsql'=>'fk_bom = '.$this->id));
 
 	    if (is_numeric($result))
 	    {
@@ -869,7 +847,7 @@ class BOM extends CommonObject
 	    else
 	    {
 	        $this->lines = $result;
-	        return $this->lines();
+	        return $this->lines;
 	    }
 	}
 
@@ -1139,11 +1117,11 @@ class BOMLine extends CommonObject
 
 		$records=array();
 
-		$sql = 'SELECT';
-		$sql .= ' t.rowid';
-		// TODO Get all fields
+		$sql = 'SELECT ';
+		$sql .= $this->getFieldList();
 		$sql .= ' FROM ' . MAIN_DB_PREFIX . $this->table_element. ' as t';
-		$sql .= ' WHERE t.entity = '.$conf->entity;
+		if ($this->ismultientitymanaged) $sql .= ' WHERE t.entity IN ('.getEntity($this->table_element).')';
+		else $sql .= ' WHERE 1 = 1';
 		// Manage filter
 		$sqlwhere = array();
 		if (count($filter) > 0) {
@@ -1180,11 +1158,8 @@ class BOMLine extends CommonObject
 			while ($obj = $this->db->fetch_object($resql))
 			{
 				$record = new self($this->db);
+				$record->setVarsFromFetchObj($obj);
 
-				$record->id = $obj->rowid;
-				// TODO Get other fields
-
-				//var_dump($record->id);
 				$records[$record->id] = $record;
 			}
 			$this->db->free($resql);
diff --git a/htdocs/core/actions_fetchobject.inc.php b/htdocs/core/actions_fetchobject.inc.php
index 780895e47a9..dc8ee938bfc 100644
--- a/htdocs/core/actions_fetchobject.inc.php
+++ b/htdocs/core/actions_fetchobject.inc.php
@@ -32,8 +32,8 @@ if (($id > 0 || (! empty($ref) && ! in_array($action, array('create', 'createtas
 {
 	if (($id > 0 && is_numeric($id)) || ! empty($ref))	// To discard case when id is list of ids like '1,2,3...'
 	{
-	    $ret = $object->fetch($id, $ref);
-	    if ($ret > 0)
+		$ret = $object->fetch($id, $ref);
+		if ($ret > 0)
 	    {
 	        $object->fetch_thirdparty();
 	        $id = $object->id;
diff --git a/htdocs/core/class/commonobject.class.php b/htdocs/core/class/commonobject.class.php
index a064e611c2f..5a09ea17127 100644
--- a/htdocs/core/class/commonobject.class.php
+++ b/htdocs/core/class/commonobject.class.php
@@ -4103,7 +4103,7 @@ abstract class CommonObject
 				// Define output language and label
 				if (! empty($conf->global->MAIN_MULTILANGS))
 				{
-					if (! is_object($this->thirdparty))
+					if (property_exists($this, 'socid') && ! is_object($this->thirdparty))
 					{
 						dol_print_error('', 'Error: Method printObjectLine was called on an object and object->fetch_thirdparty was not done before');
 						return;
@@ -4115,7 +4115,7 @@ abstract class CommonObject
 					$outputlangs = $langs;
 					$newlang='';
 					if (empty($newlang) && GETPOST('lang_id', 'aZ09')) $newlang=GETPOST('lang_id', 'aZ09');
-					if (! empty($conf->global->PRODUIT_TEXTS_IN_THIRDPARTY_LANGUAGE) && empty($newlang)) $newlang=$this->thirdparty->default_lang;		// For language to language of customer
+					if (! empty($conf->global->PRODUIT_TEXTS_IN_THIRDPARTY_LANGUAGE) && empty($newlang) && is_object($this->thirdparty)) $newlang=$this->thirdparty->default_lang;		// To use language of customer
 					if (! empty($newlang))
 					{
 						$outputlangs = new Translate("", $conf);
@@ -7370,6 +7370,56 @@ abstract class CommonObject
 		}
 	}
 
+	/**
+	 * Load object in memory from the database
+	 *
+	 * @param	string	$morewhere		More SQL filters (' AND ...')
+	 * @return 	int         			<0 if KO, 0 if not found, >0 if OK
+	 */
+	public function fetchLinesCommon($morewhere = '')
+	{
+		$objectlineclassname = get_class($this).'Line';
+		if (! class_exists($objectlineclassname))
+		{
+			$this->error = 'Error, class '.$objectlineclassname.' not found during call of fetchLinesCommon';
+			return -1;
+		}
+
+		$objectline = new $objectlineclassname($this->db);
+
+		$sql = 'SELECT '.$objectline->getFieldList();
+		$sql.= ' FROM '.MAIN_DB_PREFIX.$objectline->table_element;
+		$sql.=' WHERE fk_'.$this->element.' = '.$this->id;
+		if ($morewhere)   $sql.= $morewhere;
+
+		$resql = $this->db->query($sql);
+		if ($resql)
+		{
+			$num_rows = $this->db->num_rows($resql);
+			$i = 0;
+			while ($i < $num_rows)
+			{
+				$obj = $this->db->fetch_object($resql);
+				if ($obj)
+				{
+					$newline = new $objectlineclassname($this->db);
+					$newline->setVarsFromFetchObj($obj);
+
+					$this->lines[] = $newline;
+				}
+				$i++;
+			}
+
+			return 1;
+		}
+		else
+		{
+			$this->error = $this->db->lasterror();
+			$this->errors[] = $this->error;
+			return -1;
+		}
+	}
+
 	/**
 	 * Update object into database
 	 *
diff --git a/htdocs/modulebuilder/template/class/myobject.class.php b/htdocs/modulebuilder/template/class/myobject.class.php
index c36debb9a12..c85ceb3c18b 100644
--- a/htdocs/modulebuilder/template/class/myobject.class.php
+++ b/htdocs/modulebuilder/template/class/myobject.class.php
@@ -42,6 +42,11 @@ class MyObject extends CommonObject
 	 */
 	public $table_element = 'mymodule_myobject';
 
+	/**
+	 * @var string Name of subtable if this object has sub lines
+	 */
+	//public $table_element_line = 'mymodule_myobjectline';
+
 	/**
 	 * @var int  Does myobject support multicompany module ? 0=No test on entity, 1=Test with field entity, 2=Test with link by societe
 	 */
@@ -327,14 +332,14 @@ class MyObject extends CommonObject
 	 *
 	 * @return int         <0 if KO, 0 if not found, >0 if OK
 	 */
-	/*public function fetchLines()
+	public function fetchLines()
 	{
 		$this->lines=array();
 
-		// Load lines with object MyObjectLine
+		$result = $this->fetchLinesCommon();
+		return $result;
+	}
 
-		return count($this->lines)?1:0;
-	}*/
 
 	/**
 	 * Load list of objects in memory from the database.
@@ -355,11 +360,11 @@ class MyObject extends CommonObject
 
 		$records=array();
 
-		$sql = 'SELECT';
-		$sql .= ' t.rowid';
-		// TODO Get all fields
+		$sql = 'SELECT ';
+		$sql .= $this->getFieldList();
 		$sql .= ' FROM ' . MAIN_DB_PREFIX . $this->table_element. ' as t';
-		$sql .= ' WHERE t.entity = '.$conf->entity;
+		if ($this->ismultientitymanaged) $sql .= ' WHERE t.entity IN ('.getEntity($this->table_element).')';
+		else $sql .= ' WHERE 1 = 1';
 		// Manage filter
 		$sqlwhere = array();
 		if (count($filter) > 0) {
@@ -398,11 +403,8 @@ class MyObject extends CommonObject
 			    $obj = $this->db->fetch_object($resql);
 
 				$record = new self($this->db);
+				$record->setVarsFromFetchObj($obj);
 
-				$record->id = $obj->rowid;
-				// TODO Get other fields
-
-				//var_dump($record->id);
 				$records[$record->id] = $record;
 
 				$i++;
@@ -649,8 +651,8 @@ class MyObject extends CommonObject
 	{
 	    $this->lines=array();
 
-	    $objectline = new BOMLine($this->db);
-	    $result = $objectline->fetchAll('', '', 0, 0, array('fk_myobject'=>$this->id));
+	    $objectline = new MyObjectLine($this->db);
+	    $result = $objectline->fetchAll('', '', 0, 0, array('customsql'=>'fk_myobject = '.$this->id));
 
 	    if (is_numeric($result))
 	    {
@@ -661,7 +663,7 @@ class MyObject extends CommonObject
 	    else
 	    {
 	        $this->lines = $result;
-	        return $this->lines();
+	        return $this->lines;
 	    }
 	}
 
@@ -699,14 +701,7 @@ class MyObject extends CommonObject
 /**
  * Class MyObjectLine. You can also remove this and generate a CRUD class for lines objects.
  */
-/*
 class MyObjectLine
 {
-    // @var int ID
-    public $id;
-    // @var mixed Sample line property 1
-    public $prop1;
-    // @var mixed Sample line property 2
-    public $prop2;
+	// To complete with content of an object MyObjectLine
 }
-*/
diff --git a/htdocs/modulebuilder/template/myobject_card.php b/htdocs/modulebuilder/template/myobject_card.php
index 1fc376dfe17..159dc897fa3 100644
--- a/htdocs/modulebuilder/template/myobject_card.php
+++ b/htdocs/modulebuilder/template/myobject_card.php
@@ -389,8 +389,7 @@ if ($object->id > 0 && (empty($action) || ($action != 'edit' && $action != 'crea
 
     	if (! empty($object->lines))
     	{
-            // printObjectLines return void
-    	    $object->printObjectLines($action, $mysoc, $soc, $lineid, 1);
+    		$object->printObjectLines($action, $mysoc, null, GETPOST('lineid', 'int'), 1);
     	}
 
     	// Form to add new line