Saving Response Data Only If Assertion Fails

[David Miller]

Hello 
 
Is there a way to save the response data of a test only for those values
where the Assertion Tests failed?
 
I know I can retrieve all the response data by setting :
jmeter.save.saveservice.response_data=true in the jmeter.properties file,
but saving all the response data for my tests would make my script dump a
massive file if run over a week or so.
 
Has anyone got any ideas as to how i could implement this?
 
Thanks.
Dave.