smiley

You should use the debugger to debug your code; discussion forums aren't a replacement of debugger.

First check if your code returns the right value or not. If not, running the report is a waste of time; it can't ever show anything if the method doesn…

And don't call the SalesLine_ds.refresh();

As already said, you need to be using the RunBase framework. There are enough examples in standard.
Example - \Classes\SalesParmCleanUp