POS: "Object reference not set to an instance of an object" error

Description: After a user logs in to POS, the error message "Object reference not set to an instance of an object" displays.

Background info: The RetailHero.preferences and RetailHero.preferences.backup files can become corrupted if POS is not shut down correctly, e.g., the computer is shut down while the POS app is still running. Ensure stores are trained to close the POS app before shutting down the computer at the end of the day. 

Troubleshooting:

• Close POS. Open File Explorer and go to C:\ProgramData\RetailHero\. Delete the RetailHero.preferences and RetailHero.preferences.backup files. Restart POS.
• If deleting the preferences files does not work, try uninstalling and reinstalling the POS app.
• If the error persists, open File Explorer and go to C:\ProgramData\RetailHero\RMH POS\. Review the detailed RetailHero.POS.log files and, if necessary, enter a ticket for RMH Support.