Error: The payment terminal is currently in use by Ticket Entry
Summary:
Error: The payment terminal is currently in use by Ticket Entry and cannot be used to enter the customer's card information at this time.
Unable to add/edit/delete customer Card on File information while Ticket Entry window is open.
Cause:
By design.
Solution:
Only one form (either Ticket Entry or Card on File) can be used at at time, regardless if a payment terminal is installed. Having both forms open at the same time can cause issues during Payment in Ticket Entry.