Part Lister's Sum row values issues an error when any of the values contain characters instead of numbers
If checked Sum row values, totals the numerical value of all data in the column.
If the value of the property includes characters (i.e. not a just a number), there will be errors when creating a BOM through Tools > Part Lister.
In Designer, open Tools > Part lister, Click on Columns, check every property and ensure the checkbox “Sum Row Values” is unchecked for non-essential properties of non-real numbers.