This type of error typically means that Cash Register # is not set up for current location in Cash Register List Manager.
To set up a new Cash Register:
1. Click on Manage tab in your WS
2. Select Administration tools
3. Select Cash Register List Manager
4. Choose your current location and specify the name of a New Register in the next available string.
Once Cash Register profile is created you'd need to assign it to particular station/s:
1. Click on File tab in your WS
2. Choose Configuration
3. Enter the name of previously created Cash Register profile into Cash Register # field and click Save