Restrict ability to alter variables in debugger on production

A customer has asked whether there is an iSeries-usable debugger that can be 
used in such a way that a programmer cannot change the values of variables 
while stepping through a program. Reason for this is SOX. They want to avoid 
all the documentation and special approval required to do this.

I know, programmer's should not even be looking at production data. And they 
should probably have a set of test data to do this. And trying to get around 
these requirements sounds like a breach in the first place. Nonetheless, they 
are asking.

Thanks
Vern