diff --git a/osm_lcm/ns.py b/osm_lcm/ns.py
index 0c934ed8abd0c4c1f9cf9b0fd0d538de3c76ec5c..0e1402f6436eaf744f6041fb2526dc58e7cd65fb 100644
--- a/osm_lcm/ns.py
+++ b/osm_lcm/ns.py
@@ -840,6 +840,8 @@ class NsLcm(LcmBase):
                         None,
                     )
                     vdur = next((vdur for vdur in target_vnf.get("vdur", ())), None)
+                    if not vdur:
+                        return
                     for a_index, a_vld in enumerate(target["ns"]["vld"]):
                         target_vld = find_in_list(
                             get_iterable(vdur, "interfaces"),