how to get filterred source data for testing by expert debug mode

Hi expert,

I am debugging a transformation program issue, in DTP expert debug mode, in 'Debug request', in the filter tab, I filled in a few selection field. after clicking execute button, I get into start routine, stop at break point. but when I check source_package, it is blank. I suppose selected values in filter tab should be values for source_package. please tell me how to get filterred source data for testing.

Many Thanks,