diff --git a/cdci_data_analysis/analysis/parameters.py b/cdci_data_analysis/analysis/parameters.py
index ad84535f..8968c52e 100644
--- a/cdci_data_analysis/analysis/parameters.py
+++ b/cdci_data_analysis/analysis/parameters.py
@@ -552,6 +552,7 @@ def from_owl_uri(cls,
                                             "but %s doesn't have such keyword, "
                                             "so it will be discarded for the instantiation"),
                                             owl_uri, par_kw, restr, python_subclass)
+                                raise ValueError()
                     
                     for par_name, par_value in kwargs.items():
                         if var_kw_signature or par_name in call_signature.parameters: