Entrust SR200 Sdk Manual page 61

Negative, or value different from those listed here
Tips for success
♦
If you encode or program smart cards, the PC can have only one instance
(copy) of the printer driver installed.
♦
When debugging applications on Windows Vista, pop-ups are blocked. Use
another operating system or different debugging method.
The printer driver displays an error. After the operator responds, any
additional processing is based on the operator's response.
SR200 & SR300 Printer SDK Guide
Page 56