From jan@swi.psy.uva.nl  Fri Apr  7 15:11:30 2000
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Date: Fri, 7 Apr 2000 15:11:51 +0200
Message-Id: <200004071311.PAA23042@gollem.swi.psy.uva.nl>
From: Jan Wielemaker <jan@swi.psy.uva.nl>
Subject: Re: Alien goal
To: Paul Singleton <p.singleton@keele.ac.uk>,
        SWI Prolog <prolog@swi.psy.uva.nl>
In-Reply-To: Paul Singleton's message of Fri, 07 Apr 2000 00:02:16 +0100
Phone: +31 - 20 - 525 6121

> What's an "Alien goal", as in:
> 
>   ERROR: Trapped signal 22 (abort), aborting ...
>         [8] 'text/html'='text/html'
>       <Alien goal>
>         [1] '$toplevel'

This means there is a foreign-predicate active there (i.e. Prolog
calling C calling Prolog again).

	Regards --- Jan

