Do you use QuickBooks but are having trouble with error 1603? You should be aware that the QuickBooks error 1603 is not a system-wide issue and that no user action is necessary to resolve it. Although this error is harmless, folks who are not graphically inclined may find it extremely perplexing. There was an issue with saving your file before closing the software, according to the error that appears and flashes a warning message as an alert in the corner of the screen. But regardless of whether you choose "Cancel" or "Don't Save," you will need to start the procedure over from the beginning.