Sage 300 Error: Causes, Fixes, and Practical Ways to Avoid Them If there's anything that can ruin your working day, it's a Sage 300 error popping up at the time you have reports scheduled to run, bills to be sent, or monthly entries to finish. Sage 300 is powerful, sure, but as with any program that manages databases, accounting and network communication it is not immune to errors. And when they do, they occur at the most embarrassing timings. ...