Kenneth Roy Cabrera Torres wrote:
> Hi Dear SL users:
> 
> I use to have SL3.05 (CERN version), then I upgrade to 4.0 (GENERIC)
> every thing was OK, except the printer I got the following message
> when I try to send a test page to the printer:
> 
> Hubo un problema enviando Página de prueba de CUPS
> a la cola 'printer' :
> 
> lpr: error - unable to print file: server-error-service-unavailable

This very much looks like 
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=161952

Matthias

> 
> What should I do?
> 
> It seems a conflict between two lpr/lpd version,
> how can I fix this problem?
> 
> I am a novice to Linux.
> 
> Thank you for your help
> 
>