diff --git a/application/core/MY_Model.php b/application/core/MY_Model.php
index 741769f..245c78c 100644
--- a/application/core/MY_Model.php
+++ b/application/core/MY_Model.php
@@ -77,10 +77,21 @@ class MY_Model extends CI_Model{
 	function get_query_result(){
 		$query = $this->db->query($this->sql);
 		if($query === FALSE){
-			log_message('error', 'Database query failed: ' . $this->db->error()['message'] . ' | SQL: ' . $this->sql);
+			$error = $this->db->error();
+			log_message('error', 'Database query failed: ' . $error['message'] . ' | SQL: ' . $this->sql);
+			// Tijdelijk ook direct tonen voor debugging
+			if(ENVIRONMENT !== 'production'){
+				echo "SQL Error: " . $error['message'] . "\n";
+				echo "SQL: " . $this->sql . "\n";
+			}
 			return FALSE;
 		}
-		if($query->num_rows()==0){
+		$num_rows = $query->num_rows();
+		// Tijdelijk loggen voor debugging
+		if(ENVIRONMENT !== 'production'){
+			log_message('debug', 'Query returned ' . $num_rows . ' rows | SQL: ' . substr($this->sql, 0, 100));
+		}
+		if($num_rows == 0){
 			return FALSE;
 		}else{
 			return $query->result();
diff --git a/application/models/monpas/Groepen_model.php b/application/models/monpas/Groepen_model.php
index d9f5823..7f3d997 100644
--- a/application/models/monpas/Groepen_model.php
+++ b/application/models/monpas/Groepen_model.php
@@ -119,7 +119,17 @@ class Groepen_model extends MY_Model{
                       AND     GR.module         = {$module}
                     GROUP BY  GR.id, GR.naam, GR.niveau, GR.totaantal, GR.ondersteuning
                     ORDER BY  niveau, naam, GR.id ";
-        return $this->get_query_result();
+
+        // Tijdelijk debug: ook op productie loggen
+        error_log("=== GETGROEPEN DEBUG ===");
+        error_log("orgid: $orgid, schooljaarnr: $schooljaarnr, module: $module");
+        error_log("SQL: " . $this->sql);
+
+        $result = $this->get_query_result();
+
+        error_log("Result: " . ($result === FALSE ? 'FALSE' : count($result) . ' rows'));
+
+        return $result;
     }
     function getgekopieerdegroepen($orgid, $schooljaarnr, $module){
         $this->sql = "SELECT  GR.id,