Probably your kernel and userland don't match.  In particular,
savecore uses libkvm, which has to match the running kernel.

On Mon, 27 Mar 2000, Erik Winkler wrote:

> When I boot my custom kernel based on SPOT I get the following error
> message on boot:
> 
> savecore:  /netbsd: kvm_dump_mkheader: Pread: Invalid argument
> 
> What does this mean?
> 
> Erik
> 
> 
> 

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