--- /dev/null
+---
+layout: default
+title: Message detail for PLMC28
+toc: false
+---
+
+Detail for Marionette Collective message PLMC28
+===========================================
+
+Example Message
+---------------
+
+ Formats supplied to aggregation functions should be a hash
+
+Additional Information
+----------------------
+
+DDL aggregate functions can take a custom format as in the example below:
+
+ aggregate average(:total_resources, :format => "Average: %d")
+
+This error indicate that the :format above was not supplied as a hash as in the above example