Fix warning statement

galaxyproject · Nov 10, 2015 · b888645 · b888645
1 parent 3b8edf6
commit b888645
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lib/galaxy/tools/parameters/dynamic_options.py b/lib/galaxy/tools/parameters/dynamic_options.py
@@ -582,8 +582,8 @@ def get_dependency_names( self ):
     def get_fields( self, trans, other_values ):
         if self.dataset_ref_name:
             dataset = other_values.get( self.dataset_ref_name, None )
-            assert dataset is not None, "Required dataset '%s' missing from input" % self.dataset_ref_name
             if not dataset:
+                log.warn( "Required dataset '%s' missing from input" % self.dataset_ref_name )
                 return []  # no valid dataset in history
             # Ensure parsing dynamic options does not consume more than a megabyte worth memory.
             path = dataset.file_name