With Sc csv export tool, you can export the ean13 associated to products as well as associated to combinations in a single file.
In the mapping panel, the column called 'Options2' includes various options allowing you to decide whether you want to export product or combination information.
To export ean13 associated to products AND combinations, then add 2 'ean13' fields and associate them to both options, like so:
You'll find two other options in this column: 'Default behavior' and 'Product Value if combination value is empty'
if the option 'export combination is ticked => we export EAN13 associated to combinations
if the option 'export combination is not ticked => we export EAN13 associated to products
f the option 'export combination' is ticked => we export EAN13 associated to combinations OR EAN13 associated to their parent products IF (and only IF) there are no EAN13 associated to combinations.
*Note that the same options are available to UPC.