We're about to start using SolidWorks Weldment tool for structural frames, and save it as an assembly, then multiple sheetmetal parts are added to the new assy. I have a customized Cut-List - BOM that populates perfectly. Except for it adds un-wanted empty rows for the derived flat patterns for each sheetmetal part in the BOM.  I know I can individually hide each of these rows, but in many of our weldment part SubAssy's, we may have 30+ sheetmetal parts added.  And a top assy could have 4+ Weldment SubAssy's, way too much time wasted.  I need a Macro I can run, that will Hide the derived flat pattern empty rows, or hide any row in the BOM that has specific empty cells, like Columns C & D of the BOM.  Any HELP - GUIDANCE would be greatly appreciated.