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Delete lines from detail table?

Within the datamapper, is it possible to remove line items from a detail table?
I have a detail table with say 133 lines, but the last 40 lines are empty/spaces.
Can I, presumably in scripting after the data extraction, reduce the table length to 93 lines?
Thanks for your help.

Nope, once the data has been extracted, you can’t remove it. But if you put a condition that checks if the data is empty before extracting it, then you’ll achieve the same results, and it will probably be more efficient, too.