> I am a PhD student at LSBU working on 'Measuring Ripple Effect for > Object oriented software'. Didn't you ask this exact question last week? You did get a response: http://list.cs.brown.edu/pipermail/plt-scheme/2006-October/014899.html If you didn't read it, please do. I spent time reading that code, and I'd hate that effort to be wasted.