diff --git a/lib/getpositions.py b/lib/getpositions.py
index 53afb3e..93dc033 100644
--- a/lib/getpositions.py
+++ b/lib/getpositions.py
@@ -634,6 +634,8 @@ def check_existance(res_mappings: dict, res_dist: dict, res_pos: dict, res_tunne
             if s not in res_pos:
                 ret['missing_sensors'].append(s)
     for tname in res_tunnel.keys():
+        if tname == "length": # dict enthält auch die Länge aller Tunnels in einem Key
+            continue
         if len(res_tunnel[tname]) < 2 :
             ret["missing_tunnel"].append(tname)
         if len(res_tunnel[tname]) > 2 :