Debugging in RSA3

How to debug in Extractor checker(RSA3)?

I took an example where in the data source is enhanced and the code written for filling up the enhanced field in customer exit is to debugged.

Enable the Debug Mode Check box as shown below.

Keep a session break point in customer exit as shown.

Now Just execute in Extractor checker the debugger screen appears with the break-point enabled at the spot shown below.

Again press execute to go on to session which was kept in customer exit.

Hence you can see If the enhanced field is getting populated and so on in debugging..