Sage 100

is it possible to automatically print picking sheets after orders are imported.

Theoretically, you could use perform logic to call the picking sheet printing program. But you would need someone like Alnoor to see if that is practical.

Or if you have a batch program that runs the import, you could fire off a script/program that uses BOI to print the picking sheets.

What @AaronClark said. There is a BOI sample on Sage Community that shows how to print picking sheets (or maybe it's sales orders).