MoneyWorks will prompt when you try selling a product which does not have enough stock on hand.
Under the Data Entry tab of the Document Preferences, check the 'Check Stock Holdings' checkbox to activate the prompt for out of stock feature.
With the 'Check Stock Holdings' feature turned on MoneyWorks will compare the selling quantity against the stock on hand when you try to enter a product in the sales invoice. You get an 'Out of Stock' warning message when the stock on hand of a product is lower than the quantity you try to sell.
MoneyWorks does not compare the selling quantity against the re-order level during invoicing. The stock on hand of a product may be lower than the re-order level after you have entered a sales invoice, but MoneyWorks will not warn since you still have stock to sell. Instead, MoneyWorks will remind you to re-order stock every time you launch the company file when the stock on hand in lower than the re-order point.