need capturing some IPP-Printers to print from DOS applications.

I have got the error "nipplpt-device could not be opened - Error 5" after
writing this command in a user login script:

#icapture L=1 P=PA_xxx_xxx

After successfully login, iPrint Client displays below iCapture tab that
iPrint Printer is captured and DOS application is printing well.

iPrint Client is v 4.12.00

From where i got the error?
Is it possible to throttle this error?

Thanks for reply