OPEN - task 37: Scale Post Columns Procedure - Numeric grades not
converting 
https://github.com/maine207/aspen/issues/issues/issue/37
Aspen Tech Support added code to clear the cache when the procedure is
run not in preview mode. This is throwing
java.lang.UnsupportedOperationException. Waiting for a resolution or
explanation from Aspen as to why this is happening, and whether we
should expect the same to happen when we open our grade post window.