diff --git a/src/actinia_module_plugin/api/modules/actinia_process.py b/src/actinia_module_plugin/api/modules/actinia_process.py
index b61f318..7c15e10 100644
--- a/src/actinia_module_plugin/api/modules/actinia_process.py
+++ b/src/actinia_module_plugin/api/modules/actinia_process.py
@@ -66,7 +66,8 @@ def preprocess_load_tpl_and_enqueue(
         # TODO parse request data when schema is defined
         # Might be close to OGC API processes
         kwargs = {}
-        kwargs[next(iter(undef))] = rdc.request_data
+        if len(undef) > 0:
+            kwargs[next(iter(undef))] = rdc.request_data
 
         new_pc = fillTemplateFromProcessChain(actiniamodule, kwargs)
         rdc.request_data = new_pc