Script reference to Inbound Assertions

Hi

I've got a SOAP virt with a schema compliance assertion within the 'incoming' info pane

when viewing the overall virt info I can see the assertion results flagging up in red when a request comes in that is non schema compliant

how can I reference the assertion error within a script to tailor the response that is returned?

(I need to use a script as I have other responses configured within the script already based upon specific input data)

regards

Mike