diff --git a/htdocs/contact/canvas/actions_contactcard_common.class.php b/htdocs/contact/canvas/actions_contactcard_common.class.php
index e7794e1fce4..4592072e9af 100644
--- a/htdocs/contact/canvas/actions_contactcard_common.class.php
+++ b/htdocs/contact/canvas/actions_contactcard_common.class.php
@@ -42,23 +42,6 @@ abstract class ActionsContactCardCommon
 	//! Error array
 	var $errors=array();
 
-    /**
-	 *    Constructor
-	 *
-     *    @param	DoliDB	$DB				Handler acces base de donnees
-     *    @param	string	$dirmodule		Name of directory of module
-     *    @param	string	$targetmodule	Name of directory where canvas is stored
-     *    @param	string	$canvas			Name of canvas
-     *    @param	string	$card			Name of tab (sub-canvas)
-	 */
-	function __construct($DB, $dirmodule, $targetmodule, $canvas, $card)
-	{
-        $this->db				= $DB;
-        $this->dirmodule		= $dirmodule;
-        $this->targetmodule		= $targetmodule;
-        $this->canvas			= $canvas;
-        $this->card				= $card;
-	}
 	
 	/**
 	 * 	Instantiation of DAO class
diff --git a/htdocs/core/class/stats.class.php b/htdocs/core/class/stats.class.php
index df1f7404e76..f6c0b0ca5f9 100644
--- a/htdocs/core/class/stats.class.php
+++ b/htdocs/core/class/stats.class.php
@@ -31,17 +31,6 @@ abstract class Stats
 	protected $db;
 
 
-	/**
-	 *	Constructor
-	 *
-	 *	@param 		DoliDB		$DB		Database handler
-	 * 	@return 	Stats
-	 */
-	function Stats($DB)
-	{
-		$this->db = $DB;
-	}
-
 	/**
 	 * Return nb of entity by month for several years
 	 *
diff --git a/htdocs/includes/modules/DolibarrModules.class.php b/htdocs/includes/modules/DolibarrModules.class.php
index d3eecdc5668..bb5e7745995 100644
--- a/htdocs/includes/modules/DolibarrModules.class.php
+++ b/htdocs/includes/modules/DolibarrModules.class.php
@@ -49,20 +49,7 @@ abstract class DolibarrModules
     //! Tableau des documents ???
     var $docs;
 
-    var $dbversion;
-
-
-    /**
-	 *	Constructor
-	 *
-	 *  @param		DoliDB		$DB      Database handler
-     */
-    function DolibarrModules($DB)
-    {
-        $this->db = $DB ;
-        $this->dbversion = "-";
-    }
-
+    var $dbversion = "-";
 
     /**
      *      Fonction d'activation. Insere en base les constantes et boites du module
diff --git a/htdocs/includes/modules/commande/modules_commande.php b/htdocs/includes/modules/commande/modules_commande.php
index 65a7344ba09..9992255fbb2 100644
--- a/htdocs/includes/modules/commande/modules_commande.php
+++ b/htdocs/includes/modules/commande/modules_commande.php
@@ -66,7 +66,7 @@ abstract class ModelePDFCommandes extends CommonDocGenerator
  *  \brief      Classe mere des modeles de numerotation des references de commandes
  */
 
-class ModeleNumRefCommandes
+abstract class ModeleNumRefCommandes
 {
 	var $error='';
 
diff --git a/htdocs/includes/modules/dons/modules_don.php b/htdocs/includes/modules/dons/modules_don.php
index 4415e4f99d8..3d7d93e93aa 100644
--- a/htdocs/includes/modules/dons/modules_don.php
+++ b/htdocs/includes/modules/dons/modules_don.php
@@ -60,7 +60,7 @@ abstract class ModeleDon extends CommonDocGenerator
  *	\class 		ModeleNumRefDons
  *	\brief  	Classe mere des modeles de numerotation des references des dons
  */
-class ModeleNumRefDons
+abstract class ModeleNumRefDons
 {
     var $error='';
 
diff --git a/htdocs/includes/modules/facture/modules_facture.php b/htdocs/includes/modules/facture/modules_facture.php
index b51b25eda7d..d0e9437bc99 100644
--- a/htdocs/includes/modules/facture/modules_facture.php
+++ b/htdocs/includes/modules/facture/modules_facture.php
@@ -61,7 +61,7 @@ abstract class ModelePDFFactures extends CommonDocGenerator
  *	\class      ModeleNumRefFactures
  *	\brief      Classe mere des modeles de numerotation des references de facture
  */
-class ModeleNumRefFactures
+abstract class ModeleNumRefFactures
 {
 	var $error='';
 
diff --git a/htdocs/includes/modules/fichinter/modules_fichinter.php b/htdocs/includes/modules/fichinter/modules_fichinter.php
index 1f195731e8b..337ed19a406 100644
--- a/htdocs/includes/modules/fichinter/modules_fichinter.php
+++ b/htdocs/includes/modules/fichinter/modules_fichinter.php
@@ -60,7 +60,7 @@ abstract class ModelePDFFicheinter extends CommonDocGenerator
  *  \class      ModeleNumRefFicheinter
  *  \brief      Classe mere des modeles de numerotation des references de fiches d'intervention
  */
-class ModeleNumRefFicheinter
+abstract class ModeleNumRefFicheinter
 {
 	var $error='';
 
diff --git a/htdocs/includes/modules/livraison/modules_livraison.php b/htdocs/includes/modules/livraison/modules_livraison.php
index 53b8fe14b43..7c71be292ab 100644
--- a/htdocs/includes/modules/livraison/modules_livraison.php
+++ b/htdocs/includes/modules/livraison/modules_livraison.php
@@ -61,7 +61,7 @@ abstract class ModelePDFDeliveryOrder extends CommonDocGenerator
  *	\class      ModeleNumRefDeliveryOrder
  *	\brief      Classe mere des modeles de numerotation des references de bon de livraison
  */
-class ModeleNumRefDeliveryOrder
+abstract class ModeleNumRefDeliveryOrder
 {
 	var $error='';
 
diff --git a/htdocs/includes/modules/mailings/modules_mailings.php b/htdocs/includes/modules/mailings/modules_mailings.php
index 786999c6760..a8eae54a5fc 100644
--- a/htdocs/includes/modules/mailings/modules_mailings.php
+++ b/htdocs/includes/modules/mailings/modules_mailings.php
@@ -35,11 +35,6 @@ abstract class MailingTargets
     var $db='';
     var $error='';
 
-    function MailingTargets($DB)
-    {
-        $this->db=$DB;
-    }
-
     /**     \brief      Renvoi un exemple de numerotation
      *      \return     string      Retourne la traduction de la cle MailingModuleDescXXX ou XXX nom du module, ou $this->desc si non trouve
      */
diff --git a/htdocs/includes/modules/modPaypal.class.php b/htdocs/includes/modules/modPaypal.class.php
index b7914787162..31abc711e94 100644
--- a/htdocs/includes/modules/modPaypal.class.php
+++ b/htdocs/includes/modules/modPaypal.class.php
@@ -77,8 +77,8 @@ class modPaypal extends DolibarrModules
         // Dependencies
         $this->depends = array();						// List of modules id that must be enabled if this module is enabled
         $this->requiredby = array('modPaypalPlus');		// List of modules id to disable if this one is disabled
-        $this->phpmin = array(4,1);						// Minimum version of PHP required by module
-        $this->need_dolibarr_version = array(3,0,-2);	// Minimum version of Dolibarr required by module
+        $this->phpmin = array(5,2);						// Minimum version of PHP required by module
+        $this->need_dolibarr_version = array(3,0);		// Minimum version of Dolibarr required by module
         $this->langfiles = array("paypal");
 
         // Constants
diff --git a/htdocs/includes/modules/project/modules_project.php b/htdocs/includes/modules/project/modules_project.php
index 6218809a748..3702c6333cb 100644
--- a/htdocs/includes/modules/project/modules_project.php
+++ b/htdocs/includes/modules/project/modules_project.php
@@ -58,7 +58,7 @@ abstract class ModelePDFProjects extends CommonDocGenerator
  *  \class      ModeleNumRefProjects
  *  \brief      Classe mere des modeles de numerotation des references de projets
  */
-class ModeleNumRefProjects
+abstract class ModeleNumRefProjects
 {
 	var $error='';
 
diff --git a/htdocs/includes/modules/propale/modules_propale.php b/htdocs/includes/modules/propale/modules_propale.php
index 0ae70be6e0e..4be6dad6f77 100644
--- a/htdocs/includes/modules/propale/modules_propale.php
+++ b/htdocs/includes/modules/propale/modules_propale.php
@@ -61,7 +61,7 @@ abstract class ModelePDFPropales extends CommonDocGenerator
  *	\class      ModeleNumRefPropales
  *	\brief      Classe mere des modeles de numerotation des references de propales
  */
-class ModeleNumRefPropales
+abstract class ModeleNumRefPropales
 {
 	var $error='';
 
diff --git a/htdocs/includes/modules/supplier_order/modules_commandefournisseur.php b/htdocs/includes/modules/supplier_order/modules_commandefournisseur.php
index e54e109193a..001439747ee 100644
--- a/htdocs/includes/modules/supplier_order/modules_commandefournisseur.php
+++ b/htdocs/includes/modules/supplier_order/modules_commandefournisseur.php
@@ -65,7 +65,7 @@ abstract class ModelePDFSuppliersOrders extends CommonDocGenerator
  *	\class      ModeleNumRefSuppliersOrders
  *	\brief      Classe mere des modeles de numerotation des references de commandes fournisseurs
  */
-class ModeleNumRefSuppliersOrders
+abstract class ModeleNumRefSuppliersOrders
 {
 	var $error='';
 
diff --git a/htdocs/lib/admin.lib.php b/htdocs/lib/admin.lib.php
index d94fac368e7..1055b3a0ab9 100644
--- a/htdocs/lib/admin.lib.php
+++ b/htdocs/lib/admin.lib.php
@@ -789,13 +789,14 @@ function UnActivate($value, $requiredby=1)
     }
     else
     {
-        $genericMod = new DolibarrModules($db);
-        $genericMod->name=preg_replace('/^mod/i','',$modName);
-        $genericMod->style_sheet=1;
-        $genericMod->rights_class=strtolower(preg_replace('/^mod/i','',$modName));
-        $genericMod->const_name='MAIN_MODULE_'.strtoupper(preg_replace('/^mod/i','',$modName));
-        dol_syslog("modules::UnActivate Failed to find module file, we use generic function with name ".$genericMod->name);
-        $genericMod->_remove();
+        // TODO Cannot instantiate abstract class
+    	//$genericMod = new DolibarrModul($db);
+        //$genericMod->name=preg_replace('/^mod/i','',$modName);
+        //$genericMod->style_sheet=1;
+        //$genericMod->rights_class=strtolower(preg_replace('/^mod/i','',$modName));
+        //$genericMod->const_name='MAIN_MODULE_'.strtoupper(preg_replace('/^mod/i','',$modName));
+        dol_syslog("modules::UnActivate Failed to find module file, we use generic function with name " . $modName);
+        //$genericMod->_remove();
     }
 
     // Desactivation des modules qui dependent de lui
diff --git a/htdocs/societe/canvas/actions_card_common.class.php b/htdocs/societe/canvas/actions_card_common.class.php
index 88b4d2b68a5..902af90022c 100644
--- a/htdocs/societe/canvas/actions_card_common.class.php
+++ b/htdocs/societe/canvas/actions_card_common.class.php
@@ -42,24 +42,7 @@ abstract class ActionsCardCommon
 	var $error;
 	//! Error array
 	var $errors=array();
-
-    /**
-	 *    Constructor
-	 *
-     *    @param	DoliDB	$DB             Database handler
-     *    @param	string	$dirmodule		Name of directory of module
-     *    @param	string	$targetmodule	Name of directory where canvas is stored
-     *    @param	string	$canvas         Name of canvas
-     *    @param	string	$card           Name of tab (sub-canvas)
-	 */
-	function __construct($DB, $dirmodule, $targetmodule, $canvas, $card)
-	{
-        $this->db               = $DB;
-        $this->dirmodule		= $dirmodule;
-        $this->targetmodule     = $targetmodule;
-        $this->canvas           = $canvas;
-        $this->card             = $card;
-	}
+	
 
 	/**
 	 * 	Instantiation of DAO class