Mass Printing Invoices in Epicor

Do you mean that your AR Invoice Group(s) for these invoices is no longer available?

  • the AR Invoice group(s) have been previously posted?
  • so you can only open each using the Invoice tracker?

If so you might try AR->Reports->Mass Print AR Invoices with customer as a filter.
Ref Reprint multiple invoices

Or if that is too limited for your needs, try searching for posts on customizations for printing multiple invoices? Here is just one example