Support:
I'm adding to this thread in case the cause is related.

Using "Order Entry" | "Print Invoices" results in a "Nothing in range to print" message. This occurs even if the range is blank to ZZZZZZZZ and the "Reprint invoices already printed" option is checked. It also occurs if you select a particular Invoice from the finder. There are indeed invoices available, some of which are printed and others not printed.

OE 8.1E. Thank you.