This article is from the AmiTCP/IP FAQ, by Mike Meyer with numerous contributions by others.
(Thanks Oliver)
This means your particular SANA-II Driver (RHCSlip, GWCSlip, Slip, PPP) cannot fire itself up; this can often be due to an error in your configuration file (usually in (env|envarc):sana2 ... slip0.config or ppp0.config or similar) or may be that some resource on which the driver relies (e.g. serial.device) is missing, wrongly configured or not working. With GWCSlip this is usually because you've omitted something like the "DialScript=AmiTCP:DB/DialScript" parameter.
 
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