When or what are you doing when this error occurs?

Reviewing & getting ready to import the tax import file into a proseries individual reeturn

There was an update this morning, have you installed it yet?

Id update and restart the program, see if that helps at all.

This was the actual message on the screen -

"Encountered Error Code:510"

I'm curious as to what this means - I can't find anything in Proseries to explain.  It was a Proseries - 2023 message - not anything from my computer system.