On Tue, 2009-05-05 at 09:46 -0700, Hannes Schweikl wrote:
> Hi,
> 
>  
> 
> I am trying to define an additional view which is looking from the
> current aircraft position to the waypoint (lon,lat)@ground-elevation
> the aircraft is approaching. After going thru the howto on the
> flightgear wiki, I would do it the following way:

<snip>

> I added these lines to preferences.xml. After adding that, I had to
> change line 530 in view.nas to: if (index > 7 and index < 100) in
> order to get rid of a nasal error caused by the increased # of views.
> I am not sure, if that is the way to go to. I didn’t like the idea to
> change some line in some random file in order to get my additional
> view working. What would be the appropriate way to add a view?

This is an easy question, so I'll answer it.  :)

Our concept is views <100 are system views, user views are >100.  If you
had added your view in the aircraft -set file and made its number over
100 you would not have had an error.  Since you modified
preferences.xml, which, despite the name, is not intended as a
preferences file, and added a view to the system set, you have to beat
on the system to have it accepted.

You could/should have said 
<view n="100">


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