diff --git a/app/services/deepblue/yaml_populate_service.rb b/app/services/deepblue/yaml_populate_service.rb
index 16c12017..586a77fb 100644
--- a/app/services/deepblue/yaml_populate_service.rb
+++ b/app/services/deepblue/yaml_populate_service.rb
@@ -151,7 +151,8 @@ def yaml_escape_value( value, comment: false, escape: false )
 
     def yaml_export_file_path( target_dirname:, file_set: )
       file = MetadataHelper2.file_from_file_set( file_set )
-      export_file_name = file.original_name
+      export_file_name = ""
+      export_file_name = file&.original_name
       target_dirname.join "#{file_set.id}_#{export_file_name}"
     end