diff --git a/src/includes/class/class.LSformElement_jsonCompositeAttribute.php b/src/includes/class/class.LSformElement_jsonCompositeAttribute.php
index 4d2f9cde..ca8c98d7 100644
--- a/src/includes/class/class.LSformElement_jsonCompositeAttribute.php
+++ b/src/includes/class/class.LSformElement_jsonCompositeAttribute.php
@@ -363,68 +363,59 @@ class LSformElement_jsonCompositeAttribute extends LSformElement {
    * @retval void
    **/
   private function checkComponentValues($c, $value) {
-    if ($this -> getComponentConfig($c, 'multiple', false, 'bool')) {
-      foreach ($value as $val) {
-        $this -> checkComponentValue($c, $val);
+    // Check select_list component's values
+    if ($this -> getComponentConfig($c, 'type') == 'select_list') {
+      if ($this -> getComponentConfig($c, 'multiple', false, 'bool')) {
+        foreach ($value as $val) {
+          $this -> checkSelectListComponentValue($c, $val);
+        }
+      }
+      else
+        $this -> checkSelectListComponentValue($c, $value);
+    }
+
+    // Apply check data rules
+    LSsession :: loadLSclass('LSformRule', null, true);
+    foreach($this -> getComponentConfig($c, 'check_data', array(), 'array') as $ruleType => $rconf) {
+      $errors = LSformRule :: validate_values($ruleType, $value, $rconf, $this);
+      if (is_array($errors)) {
+        $retval = false;
+        foreach ($errors as $error) {
+          $this -> form -> setElementError(
+            $this -> attr_html,
+            getFData(
+              __('%{label}: %{error}'),
+              array(
+                'label' => __($this -> getComponentConfig($c, 'label')),
+                'error' => $error,
+              )
+            )
+          );
+        }
       }
     }
-    else
-      $this -> checkComponentValue($c, $value);
   }
 
   /**
-   * Check one component's value
+   * Check one select_list component's value
    *
    * @param[] $c       The component name
    * @param[] $value   The value to check
    *
    * @retval void
    **/
-  private function checkComponentValue($c, $value) {
-    $label = __($this -> getComponentConfig($c, 'label'));
-
-    // select_list components : check values
-    if ($this -> getComponentConfig($c, 'type') == 'select_list') {
-      if (!$this -> getSelectListComponentValueLabel($c, $value)) {
-        $this -> form -> setElementError(
-          $this -> attr_html,
-          getFData(
-            _('Invalid value "%{value}" for component %{component}.'),
-            array('value' => $value, 'component' => $label)
+  private function checkSelectListComponentValue($c, $value) {
+    if (!$this -> getSelectListComponentValueLabel($c, $value)) {
+      $this -> form -> setElementError(
+        $this -> attr_html,
+        getFData(
+          _('Invalid value "%{value}" for component %{component}.'),
+          array(
+            'value' => $value,
+            'component' => __($this -> getComponentConfig($c, 'label'))
           )
-        );
-      }
-    }
-
-    // Apply check data rules
-    foreach($this -> getComponentConfig($c, 'check_data', array(), 'array') as $ruleType => $rconf) {
-      $className = 'LSformRule_'.$ruleType;
-      if (LSsession::loadLSclass($className)) {
-        $r = new $className();
-        if (!$r -> validate($value, $rconf, $this)) {
-          if (isset($rconf['msg'])) {
-            $this -> form -> setElementError(
-              $this -> attr_html,
-              getFData(__($rconf['msg']), $label)
-            );
-          }
-          else {
-            $this -> form -> setElementError(
-              $this -> attr_html,
-              getFData(
-                _('Invalid value "%{value}" for component %{component}.'),
-                array('value' => $value, 'component' => $label)
-              )
-            );
-          }
-        }
-      }
-      else {
-        $this -> form -> setElementError(
-          $this -> attr_html,
-          getFData(_("Can't validate value of component %{c}."), $label)
-        );
-      }
+        )
+      );
     }
   }
 
diff --git a/src/includes/class/class.LSformElement_supannCompositeAttribute.php b/src/includes/class/class.LSformElement_supannCompositeAttribute.php
index 9e2e5392..61d363f8 100644
--- a/src/includes/class/class.LSformElement_supannCompositeAttribute.php
+++ b/src/includes/class/class.LSformElement_supannCompositeAttribute.php
@@ -470,19 +470,18 @@ class LSformElement_supannCompositeAttribute extends LSformElement {
 
         // Check component value (if configured)
         if (isset($cconf['check_data']) && is_array($cconf['check_data'])) {
+          LSsession :: loadLSclass('LSformRule', null, true);
           foreach($cconf['check_data'] as $ruleType => $rconf) {
-            $className = 'LSformRule_'.$ruleType;
-            if (!LSsession::loadLSclass($className)) {
-              $errors[] = getFData(__("Can't validate value of component %{c}."),__($cconf['label']));
-              continue;
-            }
-            $r = new $className();
-            if (!$r -> validate($value, $rconf, $this)) {
-              $errors[] = getFData(
-                __(LSconfig :: get('msg', 'Invalid value for component %{c}.', 'string', $rconf)),
-                __($cconf['label'])
-              );
-            }
+            $cerrors = LSformRule :: validate_values($ruleType, $value, $rconf, $this);
+            if (is_array($cerrors))
+              foreach ($cerrors as $cerror)
+                $errors[] = getFData(
+                  __('%{label}: %{error}'),
+                  array(
+                    'label' => __($cconf['label']),
+                    'error' => $cerror,
+                  )
+                );
           }
         }
       }