REGISTER201: Register could not be opened
What this means
You opened the register on this device and counted in a float. Your store refused to create the session.
Selling still works and no order is at risk. But as far as your store is concerned this register was never opened, so cash movements cannot be recorded against it and the shift will not appear in the register reports.
Your data
Orders are saved and sent normally — they are not affected. They simply carry no register session, so they will not be counted in that shift's register report.
Troubleshoot
- Close and reopen the register from the register panel. A fresh session usually opens cleanly.
- If the log entry names a field, the opening float is the usual culprit. Re-enter it as plain digits with a single decimal point —
10.50, not10,50or10.. - Store admin: confirm in WP Admin that the register still exists and has not been retired, and that the cashier's account has permission to manage cash.
- Any orders taken while no session existed stay in your store, but they cannot be added to a register report afterwards. If the shift matters for reconciliation, note the time the register was reopened.