Part of stoqdrivers
| Class | CriticalError | Unknown device type or bad config settings |
| Class | ConfigError | Bad config file arguments or sections |
| Class | CommError | Common communication failures |
| Class | PrinterError | General printer errors |
| Class | DriverError | Base exception for all printer errors |
| Class | OutofPaperError | No paper left |
| Class | PrinterOfflineError | Printer is offline |
| Class | AlmostOutofPaper | Almost out of paper |
| Class | HardwareFailure | Unknown hardware failure |
| Class | PendingReduceZ | A Reduce Z is pending |
| Class | PendingReadX | A Read X is pending |
| Class | CloseCouponError | Could not close the coupon. |
| Class | CouponNotOpenError | Coupon is not open. |
| Class | CouponOpenError | Coupon already is open. |
| Class | AuthenticationFailure | General authentication failure |
| Class | CommandParametersError | Parameters sent to printer are wrong. |
| Class | CommandError | Command sent to printer is wrong. |
| Class | ClosedTillError | No transactions can be done while the till is closed. |
| Class | ReduceZError | A Reduce already done. |
| Class | ReadXError | A Read X is already done. |
| Class | CouponTotalizeError | Error while totalizing a coupon. |
| Class | PaymentAdditionError | Error while adding a payment. |
| Class | CancelItemError | Error while cancelling coupon item. |
| Class | InvalidState | Invalid state for the requested operation. |
| Class | CapabilityError | General capability error. |
| Class | ItemAdditionError | Error while adding an item. |
| Class | InvalidReply | Invalid reply received |
| Class | AlreadyTotalized | The coupon is already totalized |
| Class | InvalidValue | The value specified is invalid or is not in the expected range |