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From: ShengHuo ZHU <zsh@cs.rochester.edu>
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Subject: Re: error Selecting deleted or non-existent buffer
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Steinar Bang <sb@metis.no> writes:

> When I do `g' and then `J s' to download new articles into the agent,
> it stops with this text in the mini-buffer:
> 	Error ((error Selecting deleted or non-existent buffer)).  Continue? (y or n) Yes
> 
> Anyone have any idea what causes this?  It isn't enough of an error to
> trigger a stack trace by doing this:
> 	(setq debug-on-error t)
> 
> Is there another debug variable I should set, maybe?

The error is caught by some condition-case. (setq debug-on-signal t)
helps.

ShengHuo