diff --git a/_build/data/transport.plugins.php b/_build/data/transport.plugins.php
index d6b5adf..524293f 100644
--- a/_build/data/transport.plugins.php
+++ b/_build/data/transport.plugins.php
@@ -11,6 +11,7 @@
 			'OnWebPagePrerender' => array(),
 			'OnWebPageInit' => array(),
 			'OnLoadWebPageCache' => array(),
+			'OnElementNotFound' => array(),
 		)
 	)
 );
diff --git a/core/components/debugparser/docs/changelog.txt b/core/components/debugparser/docs/changelog.txt
index 8e92b62..bc37f46 100644
--- a/core/components/debugparser/docs/changelog.txt
+++ b/core/components/debugparser/docs/changelog.txt
@@ -1,5 +1,8 @@
 Changelog for debugParser.
 
+==============
+- Added logging for not found element at OnElementNotFound event
+
 1.1.0 pl
 ==============
 - Added support of pdoParser with Fenom syntax.
diff --git a/core/components/debugparser/elements/plugins/plugin.debugparser.php b/core/components/debugparser/elements/plugins/plugin.debugparser.php
index 191196b..c300c8e 100644
--- a/core/components/debugparser/elements/plugins/plugin.debugparser.php
+++ b/core/components/debugparser/elements/plugins/plugin.debugparser.php
@@ -31,4 +31,9 @@
 			$modx->parser->generateReport();
 		}
 		break;
+
+	case 'OnElementNotFound':
+		if (method_exists($modx->parser, 'addNFElement')) {
+			$modx->parser->addNFElement($class, $name);
+		}
 }
\ No newline at end of file
diff --git a/core/components/debugparser/elements/templates/template.report.nfrow.tpl b/core/components/debugparser/elements/templates/template.report.nfrow.tpl
new file mode 100644
index 0000000..c0292de
--- /dev/null
+++ b/core/components/debugparser/elements/templates/template.report.nfrow.tpl
@@ -0,0 +1,4 @@
+<tr>
+    <td>[[+class]]</td>
+    <td class="tag">[[+elements]]</td>
+</tr>
\ No newline at end of file
diff --git a/core/components/debugparser/elements/templates/template.report.outer.tpl b/core/components/debugparser/elements/templates/template.report.outer.tpl
index 13a0254..0c97a41 100644
--- a/core/components/debugparser/elements/templates/template.report.outer.tpl
+++ b/core/components/debugparser/elements/templates/template.report.outer.tpl
@@ -48,6 +48,17 @@
 	[[+rows]]
 </table>
 
+<table class="info">
+    <thead>
+    <tr>
+        <th>Class of not found elements</th>
+        <th>Element names</th>
+    </tr>
+    </thead>
+
+    [[+nfRows]]
+</table>
+
 <table class="info">
 	<tr><th>Total parse time</th><th>[[+total_parse_time]] s</th></tr>
 	<tr><th>Total queries</th><td>[[+total_queries]]</td></tr>
diff --git a/core/components/debugparser/model/debugparser.class.php b/core/components/debugparser/model/debugparser.class.php
index 9cb36f4..ddce348 100644
--- a/core/components/debugparser/model/debugparser.class.php
+++ b/core/components/debugparser/model/debugparser.class.php
@@ -2,6 +2,7 @@
 
 class debugParser extends modParser {
 	public $tags = array();
+	public $nfElements = array();
 	public $from_cache = false;
 	/** @var modParser $parser */
 	protected $parser = null;
@@ -75,6 +76,7 @@ public function generateReport() {
 		// Get templates
 		$tplOuter = file_get_contents(MODX_CORE_PATH . 'components/debugparser/elements/templates/template.report.outer.tpl');
 		$tpl = file_get_contents(MODX_CORE_PATH . 'components/debugparser/elements/templates/template.report.row.tpl');
+		$tplNF = file_get_contents(MODX_CORE_PATH . 'components/debugparser/elements/templates/template.report.nfrow.tpl');
 
 
 		$idx = 1;
@@ -93,6 +95,14 @@ public function generateReport() {
 			}
 		}
 
+        $data['nf'] = '';
+        if (!empty($this->nfElements)) {
+            foreach ($this->nfElements as $class => $elements) {
+                $pls = $this->makePlaceholders(array('class' => $class, 'elements' => implode(', ', $elements)));
+                $data['nfRows'] .= str_replace($pls['pl'], $pls['vl'], $tplNF);
+            }
+        }
+
 		/** @var modProcessorResponse $response */
 		$response = $this->modx->runProcessor('system/info');
 		if (!$response->isError()) {
@@ -171,6 +181,15 @@ public function clearCache($context = null) {
 		}
 	}
 
+	public function addNFElement($class, $name) {
+		if (!isset($this->nfElements[$class])) {
+			$this->nfElements[$class] = array();
+		}
+		if (!in_array($name, $this->nfElements[$class])) {
+			$this->nfElements[$class][] = $name;
+		}
+	}
+
 	/**
 	 * /manager/controllers/default/system/info.class.php
 	 *
diff --git a/core/components/debugparser/model/debugpdoparser.class.php b/core/components/debugparser/model/debugpdoparser.class.php
index 282483d..6904438 100644
--- a/core/components/debugparser/model/debugpdoparser.class.php
+++ b/core/components/debugparser/model/debugpdoparser.class.php
@@ -82,4 +82,8 @@ public function clearCache($context = null) {
 		$this->parser->clearCache($context);
 	}
 
+	public function addNFElement($class, $name) {
+		$this->parser->addNFElement($class, $name);
+	}
+
 }
\ No newline at end of file