Doubt about evaluating code

Hi,

I am doing some Genetic Programming in scsh. I need to evaluate many 
randomly generated codes. The program must continue gracefully with the 
next piece of generated code in the common case that the current piece 
does not compile.

How do I do this? As I see, all errors in the code causes the shell to 
show up. Also, there is no srfi-12 support. So, how this can be done?

Please help. It will be much appreciated.

Gautham