diff --git a/htdocs/core/actions_printing.inc.php b/htdocs/core/actions_printing.inc.php
index eeecc25fbd2..030e7016a55 100644
--- a/htdocs/core/actions_printing.inc.php
+++ b/htdocs/core/actions_printing.inc.php
@@ -47,17 +47,19 @@ if ($action == 'print_file' and $user->rights->printing->read)
             if (! empty($conf->global->{$printer->active})) {
                 $subdir=(GETPOST('printer', 'alpha')=='expedition'?'sending':'');
                 $ret = $printer->print_file(GETPOST('file', 'alpha'), GETPOST('printer', 'alpha'), $subdir);
-                if ($ret < 0) {
+                if ($ret > 0) {
+                    //print '<pre>'.print_r($printer->errors, true).'</pre>';
                     setEventMessages($printer->error, $printer->errors, 'errors');
                 }
                 if ($ret==0) {
-                    setEventMessages($printer->error, $printer->errors, 'warning');
+                    //print '<pre>'.print_r($printer->errors, true).'</pre>';
+                    setEventMessages($printer->error, $printer->errors);
                     setEventMessages($langs->trans("FileWasSentToPrinter", basename(GETPOST('file'))).' '.$langs->trans("ViaModule").' '.$printer->name, null);
                     $printed++;
                 }
             }
         }
-        if ($printed==0) setEventMessages($langs->trans("NoActivePrintingModuleFound"), null);
+        if ($printed==0) setEventMessages($langs->trans("NoActivePrintingModuleFound"), null, 'warning');
     } else {
         setEventMessages($langs->trans("NoModuleFound"), null, 'warning');
     }
diff --git a/htdocs/core/modules/printing/printgcp.modules.php b/htdocs/core/modules/printing/printgcp.modules.php
index 4ce1e18b390..ab838270372 100644
--- a/htdocs/core/modules/printing/printgcp.modules.php
+++ b/htdocs/core/modules/printing/printgcp.modules.php
@@ -42,6 +42,8 @@ class printing_printgcp extends PrintingDriver
     var $conf = array();
     var $google_id = '';
     var $google_secret = '';
+    var $error;
+    var $errors = array();
     var $db;
 
     const LOGIN_URL = 'https://accounts.google.com/o/oauth2/token';
@@ -122,11 +124,12 @@ class printing_printgcp extends PrintingDriver
     /**
      *  Return list of available printers
      *
-     *  @return string                html list of printers
+     *  @return  int                     0 if OK, >0 if KO
      */
     function listAvailablePrinters()
     {
         global $bc, $conf, $langs;
+        $error = 0;
         $langs->load('printing');
         $var=true;
 
@@ -145,7 +148,7 @@ class printing_printgcp extends PrintingDriver
         $var = true;
         foreach ($list['available'] as $printer_det)
         {
-            $var=!$var;
+            $var = !$var;
             $html.= "<tr ".$bc[$var].">";
             $html.= '<td>'.$printer_det['name'].'</td>';
             $html.= '<td>'.$printer_det['displayName'].'</td>';
@@ -165,8 +168,8 @@ class printing_printgcp extends PrintingDriver
             $html.= '</td>';
             $html.= '</tr>'."\n";
         }
-
-        return $html;
+        $this->resprint = $html;
+        return $error;
     }
 
 
@@ -240,15 +243,19 @@ class printing_printgcp extends PrintingDriver
      * @param   string      $file       file
      * @param   string      $module     module
      * @param   string      $subdir     subdir for file
-     * @return  int                     0 if OK, <0 if KO
+     * @return  int                     0 if OK, >0 if KO
      */
     function print_file($file, $module, $subdir='')
     {
+        require_once DOL_DOCUMENT_ROOT.'/core/lib/files.lib.php';
+
         global $conf, $user, $db;
+        $error = 0;
 
         $fileprint=$conf->{$module}->dir_output;
         if ($subdir!='') $fileprint.='/'.$subdir;
         $fileprint.='/'.$file;
+        $mimetype = dol_mimetype($fileprint);
         // select printer uri for module order, propal,...
         $sql = "SELECT rowid, printer_id, copy FROM ".MAIN_DB_PREFIX."printing WHERE module='".$module."' AND driver='printgcp' AND userid=".$user->id;
         $result = $db->query($sql);
@@ -267,18 +274,18 @@ class printing_printgcp extends PrintingDriver
                 }
                 else
                 {
-                    return 'NoDefaultPrinterDefined';
+                    $this->errors[] = 'NoDefaultPrinterDefined';
+                    $error++;
+                    return $error;
                 }
             }
         }
         else dol_print_error($db);
 
-        $ret = $this->sendPrintToPrinter($printer_id, $file, $fileprint, 'application/pdf');
-        $this->error = 'PRINTGCP: '.$ret['errormessage'];
-        if ($ret['status']==1) 
-            return 0;
-        else
-            return -1;
+        $ret = $this->sendPrintToPrinter($printer_id, $file, $fileprint, $mimetype);
+        $this->errors = 'PRINTGCP: '.mb_convert_encoding($ret['errormessage'], "UTF-8");
+        if ($ret['status']!=1) $error++;
+        return $error;
     }
 
     /**
diff --git a/htdocs/core/modules/printing/printipp.modules.php b/htdocs/core/modules/printing/printipp.modules.php
index 6e8ad305339..eaf655d7edf 100644
--- a/htdocs/core/modules/printing/printipp.modules.php
+++ b/htdocs/core/modules/printing/printipp.modules.php
@@ -41,6 +41,7 @@ class printing_printipp extends PrintingDriver
     var $user;
     var $password;
     var $error;
+    var $errors = array();
     var $db;
 
 
@@ -72,11 +73,12 @@ class printing_printipp extends PrintingDriver
      * @param   string      $module     module
      * @param   string      $subdir     subdirectory of document like for expedition subdir is sendings
      *
-     * @return  int                     0 if OK, <0 if KO
+     * @return  int                     0 if OK, >0 if KO
      */
     function print_file($file, $module, $subdir='')
     {
         global $conf, $user, $db;
+        $error = 0;
 
         include_once DOL_DOCUMENT_ROOT.'/includes/printipp/CupsPrintIPP.php';
 
@@ -108,8 +110,9 @@ class printing_printipp extends PrintingDriver
                 }
                 else
 				{
-                    $this->error = 'NoDefaultPrinterDefined';
-                    return -1;
+                    $this->errors[] = 'NoDefaultPrinterDefined';
+                    $error++;
+                    return $error;
                 }
             }
         }
@@ -121,19 +124,26 @@ class printing_printipp extends PrintingDriver
         if ($subdir!='') $fileprint.='/'.$subdir;
         $fileprint.='/'.$file;
         $ipp->setData($fileprint);
-        $ipp->printJob();
+        try {
+            $ipp->printJob();
+        } catch (Exception $e) {
+            $this->errors[] = $e->getMessage();
+            $error++;
+        }
+        if ($error==0) $this->errors[] = 'PRINTIPP: Job added';
 
-        return 0;
+        return $error;
     }
 
     /**
      *  Return list of available printers
      *
-     *  @return string                html list of printers
+     *  @return  int                     0 if OK, >0 if KO
      */
     function listAvailablePrinters()
     {
         global $bc, $conf, $langs;
+        $error = 0;
         $var=true;
 
         $html = '<tr class="liste_titre">';
@@ -180,8 +190,8 @@ class printing_printipp extends PrintingDriver
 			$html.= '</td>';
             $html.= '</tr>'."\n";
         }
-
-        return $html;
+        $this->resprint = $html;
+        return $error;
     }
 
     /**
diff --git a/htdocs/printing/admin/printing.php b/htdocs/printing/admin/printing.php
index da7de1bbdfb..6a28f352578 100644
--- a/htdocs/printing/admin/printing.php
+++ b/htdocs/printing/admin/printing.php
@@ -256,7 +256,11 @@ if ($mode == 'test' && $user->admin)
         $printer = new $classname($db);
         //print '<pre>'.print_r($printer, true).'</pre>';
         if (count($printer->getlist_available_printers())) {
-            print $printer->listAvailablePrinters();
+            if ($printer->listAvailablePrinters()==0) {
+                print $printer->resprint;
+            } else {
+                setEventMessages($printer->error, $printer->errors, 'errors');
+            }
         }
         else {
             print $langs->trans('PleaseConfigureDriverfromList');