POS: "InvalidOperationException" error

Description: In POS, while a cashier or salesperson is ringing up a transaction, the error message "Exception 'InvalidOperationException' has been thrown" displays. After the error message displays, the cashier or salesperson cannot scan or manually add items to the transaction.

Workaround: 

1. Tap OK to acknowledge the error.
2. Continue scanning or manually adding items to the transaction.
3. Tender the transaction.

Troubleshooting:

• If RMH was recently upgraded:
  • Check the release notes for known issues.
  • Check the release documentation for changes to the POS commands.
  • Check the release documentation for changes to the database and schema.
• If the store uses a third party extension for POS, contact the company that sells and maintains the extension to ensure it is compatible with the latest RMH release.